1339 lines
52 KiB
C
1339 lines
52 KiB
C
#include "nuklear.h"
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#include "nuklear_internal.h"
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/* ===============================================================
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*
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* VERTEX
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*
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* ===============================================================*/
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#ifdef NK_INCLUDE_VERTEX_BUFFER_OUTPUT
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NK_API void
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nk_draw_list_init(struct nk_draw_list *list)
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{
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nk_size i = 0;
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NK_ASSERT(list);
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if (!list) return;
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nk_zero(list, sizeof(*list));
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for (i = 0; i < NK_LEN(list->circle_vtx); ++i) {
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const float a = ((float)i / (float)NK_LEN(list->circle_vtx)) * 2 * NK_PI;
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list->circle_vtx[i].x = (float)NK_COS(a);
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list->circle_vtx[i].y = (float)NK_SIN(a);
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}
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}
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NK_API void
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nk_draw_list_setup(struct nk_draw_list *canvas, const struct nk_convert_config *config,
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struct nk_buffer *cmds, struct nk_buffer *vertices, struct nk_buffer *elements,
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enum nk_anti_aliasing line_aa, enum nk_anti_aliasing shape_aa)
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{
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NK_ASSERT(canvas);
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NK_ASSERT(config);
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NK_ASSERT(cmds);
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NK_ASSERT(vertices);
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NK_ASSERT(elements);
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if (!canvas || !config || !cmds || !vertices || !elements)
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return;
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canvas->buffer = cmds;
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canvas->config = *config;
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canvas->elements = elements;
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canvas->vertices = vertices;
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canvas->line_AA = line_aa;
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canvas->shape_AA = shape_aa;
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canvas->clip_rect = nk_null_rect;
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canvas->cmd_offset = 0;
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canvas->element_count = 0;
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canvas->vertex_count = 0;
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canvas->cmd_offset = 0;
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canvas->cmd_count = 0;
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canvas->path_count = 0;
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}
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NK_API const struct nk_draw_command*
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nk__draw_list_begin(const struct nk_draw_list *canvas, const struct nk_buffer *buffer)
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{
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nk_byte *memory;
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nk_size offset;
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const struct nk_draw_command *cmd;
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NK_ASSERT(buffer);
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if (!buffer || !buffer->size || !canvas->cmd_count)
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return 0;
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memory = (nk_byte*)buffer->memory.ptr;
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offset = buffer->memory.size - canvas->cmd_offset;
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cmd = nk_ptr_add(const struct nk_draw_command, memory, offset);
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return cmd;
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}
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NK_API const struct nk_draw_command*
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nk__draw_list_end(const struct nk_draw_list *canvas, const struct nk_buffer *buffer)
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{
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nk_size size;
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nk_size offset;
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nk_byte *memory;
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const struct nk_draw_command *end;
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NK_ASSERT(buffer);
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NK_ASSERT(canvas);
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if (!buffer || !canvas)
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return 0;
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memory = (nk_byte*)buffer->memory.ptr;
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size = buffer->memory.size;
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offset = size - canvas->cmd_offset;
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end = nk_ptr_add(const struct nk_draw_command, memory, offset);
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end -= (canvas->cmd_count-1);
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return end;
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}
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NK_API const struct nk_draw_command*
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nk__draw_list_next(const struct nk_draw_command *cmd,
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const struct nk_buffer *buffer, const struct nk_draw_list *canvas)
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{
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const struct nk_draw_command *end;
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NK_ASSERT(buffer);
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NK_ASSERT(canvas);
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if (!cmd || !buffer || !canvas)
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return 0;
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end = nk__draw_list_end(canvas, buffer);
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if (cmd <= end) return 0;
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return (cmd-1);
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}
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NK_INTERN struct nk_vec2*
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nk_draw_list_alloc_path(struct nk_draw_list *list, int count)
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{
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struct nk_vec2 *points;
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NK_STORAGE const nk_size point_align = NK_ALIGNOF(struct nk_vec2);
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NK_STORAGE const nk_size point_size = sizeof(struct nk_vec2);
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points = (struct nk_vec2*)
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nk_buffer_alloc(list->buffer, NK_BUFFER_FRONT,
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point_size * (nk_size)count, point_align);
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if (!points) return 0;
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if (!list->path_offset) {
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void *memory = nk_buffer_memory(list->buffer);
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list->path_offset = (unsigned int)((nk_byte*)points - (nk_byte*)memory);
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}
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list->path_count += (unsigned int)count;
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return points;
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}
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NK_INTERN struct nk_vec2
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nk_draw_list_path_last(struct nk_draw_list *list)
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{
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void *memory;
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struct nk_vec2 *point;
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NK_ASSERT(list->path_count);
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memory = nk_buffer_memory(list->buffer);
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point = nk_ptr_add(struct nk_vec2, memory, list->path_offset);
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point += (list->path_count-1);
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return *point;
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}
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NK_INTERN struct nk_draw_command*
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nk_draw_list_push_command(struct nk_draw_list *list, struct nk_rect clip,
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nk_handle texture)
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{
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NK_STORAGE const nk_size cmd_align = NK_ALIGNOF(struct nk_draw_command);
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NK_STORAGE const nk_size cmd_size = sizeof(struct nk_draw_command);
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struct nk_draw_command *cmd;
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NK_ASSERT(list);
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cmd = (struct nk_draw_command*)
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nk_buffer_alloc(list->buffer, NK_BUFFER_BACK, cmd_size, cmd_align);
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if (!cmd) return 0;
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if (!list->cmd_count) {
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nk_byte *memory = (nk_byte*)nk_buffer_memory(list->buffer);
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nk_size total = nk_buffer_total(list->buffer);
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memory = nk_ptr_add(nk_byte, memory, total);
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list->cmd_offset = (nk_size)(memory - (nk_byte*)cmd);
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}
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cmd->elem_count = 0;
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cmd->clip_rect = clip;
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cmd->texture = texture;
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#ifdef NK_INCLUDE_COMMAND_USERDATA
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cmd->userdata = list->userdata;
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#endif
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list->cmd_count++;
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list->clip_rect = clip;
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return cmd;
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}
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NK_INTERN struct nk_draw_command*
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nk_draw_list_command_last(struct nk_draw_list *list)
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{
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void *memory;
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nk_size size;
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struct nk_draw_command *cmd;
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NK_ASSERT(list->cmd_count);
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memory = nk_buffer_memory(list->buffer);
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size = nk_buffer_total(list->buffer);
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cmd = nk_ptr_add(struct nk_draw_command, memory, size - list->cmd_offset);
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return (cmd - (list->cmd_count-1));
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}
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NK_INTERN void
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nk_draw_list_add_clip(struct nk_draw_list *list, struct nk_rect rect)
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{
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NK_ASSERT(list);
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if (!list) return;
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if (!list->cmd_count) {
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nk_draw_list_push_command(list, rect, list->config.null.texture);
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} else {
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struct nk_draw_command *prev = nk_draw_list_command_last(list);
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if (prev->elem_count == 0)
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prev->clip_rect = rect;
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nk_draw_list_push_command(list, rect, prev->texture);
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}
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}
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NK_INTERN void
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nk_draw_list_push_image(struct nk_draw_list *list, nk_handle texture)
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{
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NK_ASSERT(list);
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if (!list) return;
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if (!list->cmd_count) {
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nk_draw_list_push_command(list, nk_null_rect, texture);
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} else {
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struct nk_draw_command *prev = nk_draw_list_command_last(list);
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if (prev->elem_count == 0) {
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prev->texture = texture;
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#ifdef NK_INCLUDE_COMMAND_USERDATA
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prev->userdata = list->userdata;
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#endif
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} else if (prev->texture.id != texture.id
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#ifdef NK_INCLUDE_COMMAND_USERDATA
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|| prev->userdata.id != list->userdata.id
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#endif
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) nk_draw_list_push_command(list, prev->clip_rect, texture);
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}
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}
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#ifdef NK_INCLUDE_COMMAND_USERDATA
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NK_API void
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nk_draw_list_push_userdata(struct nk_draw_list *list, nk_handle userdata)
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{
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list->userdata = userdata;
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}
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#endif
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NK_INTERN void*
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nk_draw_list_alloc_vertices(struct nk_draw_list *list, nk_size count)
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{
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void *vtx;
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NK_ASSERT(list);
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if (!list) return 0;
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vtx = nk_buffer_alloc(list->vertices, NK_BUFFER_FRONT,
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list->config.vertex_size*count, list->config.vertex_alignment);
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if (!vtx) return 0;
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list->vertex_count += (unsigned int)count;
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/* This assert triggers because your are drawing a lot of stuff and nuklear
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* defined `nk_draw_index` as `nk_ushort` to safe space be default.
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*
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* So you reached the maximum number of indices or rather vertexes.
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* To solve this issue please change typedef `nk_draw_index` to `nk_uint`
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* and don't forget to specify the new element size in your drawing
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* backend (OpenGL, DirectX, ...). For example in OpenGL for `glDrawElements`
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* instead of specifying `GL_UNSIGNED_SHORT` you have to define `GL_UNSIGNED_INT`.
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* Sorry for the inconvenience. */
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if(sizeof(nk_draw_index)==2) NK_ASSERT((list->vertex_count < NK_USHORT_MAX &&
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"To many vertices for 16-bit vertex indices. Please read comment above on how to solve this problem"));
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return vtx;
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}
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NK_INTERN nk_draw_index*
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nk_draw_list_alloc_elements(struct nk_draw_list *list, nk_size count)
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{
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nk_draw_index *ids;
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struct nk_draw_command *cmd;
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NK_STORAGE const nk_size elem_align = NK_ALIGNOF(nk_draw_index);
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NK_STORAGE const nk_size elem_size = sizeof(nk_draw_index);
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NK_ASSERT(list);
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if (!list) return 0;
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ids = (nk_draw_index*)
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nk_buffer_alloc(list->elements, NK_BUFFER_FRONT, elem_size*count, elem_align);
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if (!ids) return 0;
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cmd = nk_draw_list_command_last(list);
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list->element_count += (unsigned int)count;
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cmd->elem_count += (unsigned int)count;
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return ids;
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}
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NK_INTERN int
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nk_draw_vertex_layout_element_is_end_of_layout(
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const struct nk_draw_vertex_layout_element *element)
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{
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return (element->attribute == NK_VERTEX_ATTRIBUTE_COUNT ||
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element->format == NK_FORMAT_COUNT);
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}
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NK_INTERN void
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nk_draw_vertex_color(void *attr, const float *vals,
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enum nk_draw_vertex_layout_format format)
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{
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/* if this triggers you tried to provide a value format for a color */
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float val[4];
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NK_ASSERT(format >= NK_FORMAT_COLOR_BEGIN);
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NK_ASSERT(format <= NK_FORMAT_COLOR_END);
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if (format < NK_FORMAT_COLOR_BEGIN || format > NK_FORMAT_COLOR_END) return;
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val[0] = NK_SATURATE(vals[0]);
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val[1] = NK_SATURATE(vals[1]);
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val[2] = NK_SATURATE(vals[2]);
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val[3] = NK_SATURATE(vals[3]);
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switch (format) {
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default: NK_ASSERT(0 && "Invalid vertex layout color format"); break;
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case NK_FORMAT_R8G8B8A8:
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case NK_FORMAT_R8G8B8: {
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struct nk_color col = nk_rgba_fv(val);
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NK_MEMCPY(attr, &col.r, sizeof(col));
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} break;
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case NK_FORMAT_B8G8R8A8: {
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struct nk_color col = nk_rgba_fv(val);
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struct nk_color bgra = nk_rgba(col.b, col.g, col.r, col.a);
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NK_MEMCPY(attr, &bgra, sizeof(bgra));
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} break;
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case NK_FORMAT_R16G15B16: {
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nk_ushort col[3];
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col[0] = (nk_ushort)(val[0]*(float)NK_USHORT_MAX);
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col[1] = (nk_ushort)(val[1]*(float)NK_USHORT_MAX);
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col[2] = (nk_ushort)(val[2]*(float)NK_USHORT_MAX);
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NK_MEMCPY(attr, col, sizeof(col));
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} break;
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case NK_FORMAT_R16G15B16A16: {
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nk_ushort col[4];
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col[0] = (nk_ushort)(val[0]*(float)NK_USHORT_MAX);
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col[1] = (nk_ushort)(val[1]*(float)NK_USHORT_MAX);
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col[2] = (nk_ushort)(val[2]*(float)NK_USHORT_MAX);
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col[3] = (nk_ushort)(val[3]*(float)NK_USHORT_MAX);
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NK_MEMCPY(attr, col, sizeof(col));
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} break;
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case NK_FORMAT_R32G32B32: {
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nk_uint col[3];
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col[0] = (nk_uint)(val[0]*(float)NK_UINT_MAX);
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col[1] = (nk_uint)(val[1]*(float)NK_UINT_MAX);
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col[2] = (nk_uint)(val[2]*(float)NK_UINT_MAX);
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NK_MEMCPY(attr, col, sizeof(col));
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} break;
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case NK_FORMAT_R32G32B32A32: {
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nk_uint col[4];
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col[0] = (nk_uint)(val[0]*(float)NK_UINT_MAX);
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col[1] = (nk_uint)(val[1]*(float)NK_UINT_MAX);
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col[2] = (nk_uint)(val[2]*(float)NK_UINT_MAX);
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col[3] = (nk_uint)(val[3]*(float)NK_UINT_MAX);
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NK_MEMCPY(attr, col, sizeof(col));
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} break;
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case NK_FORMAT_R32G32B32A32_FLOAT:
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NK_MEMCPY(attr, val, sizeof(float)*4);
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break;
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case NK_FORMAT_R32G32B32A32_DOUBLE: {
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double col[4];
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col[0] = (double)val[0];
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col[1] = (double)val[1];
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col[2] = (double)val[2];
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col[3] = (double)val[3];
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NK_MEMCPY(attr, col, sizeof(col));
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} break;
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case NK_FORMAT_RGB32:
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case NK_FORMAT_RGBA32: {
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struct nk_color col = nk_rgba_fv(val);
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nk_uint color = nk_color_u32(col);
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NK_MEMCPY(attr, &color, sizeof(color));
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} break; }
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}
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NK_INTERN void
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nk_draw_vertex_element(void *dst, const float *values, int value_count,
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enum nk_draw_vertex_layout_format format)
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{
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int value_index;
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void *attribute = dst;
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/* if this triggers you tried to provide a color format for a value */
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NK_ASSERT(format < NK_FORMAT_COLOR_BEGIN);
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if (format >= NK_FORMAT_COLOR_BEGIN && format <= NK_FORMAT_COLOR_END) return;
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for (value_index = 0; value_index < value_count; ++value_index) {
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switch (format) {
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default: NK_ASSERT(0 && "invalid vertex layout format"); break;
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case NK_FORMAT_SCHAR: {
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char value = (char)NK_CLAMP((float)NK_SCHAR_MIN, values[value_index], (float)NK_SCHAR_MAX);
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(char));
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} break;
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case NK_FORMAT_SSHORT: {
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nk_short value = (nk_short)NK_CLAMP((float)NK_SSHORT_MIN, values[value_index], (float)NK_SSHORT_MAX);
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(value));
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} break;
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case NK_FORMAT_SINT: {
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nk_int value = (nk_int)NK_CLAMP((float)NK_SINT_MIN, values[value_index], (float)NK_SINT_MAX);
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(nk_int));
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} break;
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case NK_FORMAT_UCHAR: {
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unsigned char value = (unsigned char)NK_CLAMP((float)NK_UCHAR_MIN, values[value_index], (float)NK_UCHAR_MAX);
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(unsigned char));
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} break;
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case NK_FORMAT_USHORT: {
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nk_ushort value = (nk_ushort)NK_CLAMP((float)NK_USHORT_MIN, values[value_index], (float)NK_USHORT_MAX);
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(value));
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} break;
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case NK_FORMAT_UINT: {
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nk_uint value = (nk_uint)NK_CLAMP((float)NK_UINT_MIN, values[value_index], (float)NK_UINT_MAX);
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(nk_uint));
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} break;
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case NK_FORMAT_FLOAT:
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NK_MEMCPY(attribute, &values[value_index], sizeof(values[value_index]));
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attribute = (void*)((char*)attribute + sizeof(float));
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break;
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case NK_FORMAT_DOUBLE: {
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double value = (double)values[value_index];
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NK_MEMCPY(attribute, &value, sizeof(value));
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attribute = (void*)((char*)attribute + sizeof(double));
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} break;
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}
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}
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}
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NK_INTERN void*
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nk_draw_vertex(void *dst, const struct nk_convert_config *config,
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struct nk_vec2 pos, struct nk_vec2 uv, struct nk_colorf color)
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{
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void *result = (void*)((char*)dst + config->vertex_size);
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const struct nk_draw_vertex_layout_element *elem_iter = config->vertex_layout;
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while (!nk_draw_vertex_layout_element_is_end_of_layout(elem_iter)) {
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void *address = (void*)((char*)dst + elem_iter->offset);
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switch (elem_iter->attribute) {
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case NK_VERTEX_ATTRIBUTE_COUNT:
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default: NK_ASSERT(0 && "wrong element attribute"); break;
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case NK_VERTEX_POSITION: nk_draw_vertex_element(address, &pos.x, 2, elem_iter->format); break;
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case NK_VERTEX_TEXCOORD: nk_draw_vertex_element(address, &uv.x, 2, elem_iter->format); break;
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case NK_VERTEX_COLOR: nk_draw_vertex_color(address, &color.r, elem_iter->format); break;
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}
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elem_iter++;
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}
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return result;
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}
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NK_API void
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nk_draw_list_stroke_poly_line(struct nk_draw_list *list, const struct nk_vec2 *points,
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const unsigned int points_count, struct nk_color color, enum nk_draw_list_stroke closed,
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float thickness, enum nk_anti_aliasing aliasing)
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{
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nk_size count;
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int thick_line;
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struct nk_colorf col;
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struct nk_colorf col_trans;
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NK_ASSERT(list);
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if (!list || points_count < 2) return;
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color.a = (nk_byte)((float)color.a * list->config.global_alpha);
|
|
count = points_count;
|
|
if (!closed) count = points_count-1;
|
|
thick_line = thickness > 1.0f;
|
|
|
|
#ifdef NK_INCLUDE_COMMAND_USERDATA
|
|
nk_draw_list_push_userdata(list, list->userdata);
|
|
#endif
|
|
|
|
color.a = (nk_byte)((float)color.a * list->config.global_alpha);
|
|
nk_color_fv(&col.r, color);
|
|
col_trans = col;
|
|
col_trans.a = 0;
|
|
|
|
if (aliasing == NK_ANTI_ALIASING_ON) {
|
|
/* ANTI-ALIASED STROKE */
|
|
const float AA_SIZE = 1.0f;
|
|
NK_STORAGE const nk_size pnt_align = NK_ALIGNOF(struct nk_vec2);
|
|
NK_STORAGE const nk_size pnt_size = sizeof(struct nk_vec2);
|
|
|
|
/* allocate vertices and elements */
|
|
nk_size i1 = 0;
|
|
nk_size vertex_offset;
|
|
nk_size index = list->vertex_count;
|
|
|
|
const nk_size idx_count = (thick_line) ? (count * 18) : (count * 12);
|
|
const nk_size vtx_count = (thick_line) ? (points_count * 4): (points_count *3);
|
|
|
|
void *vtx = nk_draw_list_alloc_vertices(list, vtx_count);
|
|
nk_draw_index *ids = nk_draw_list_alloc_elements(list, idx_count);
|
|
|
|
nk_size size;
|
|
struct nk_vec2 *normals, *temp;
|
|
if (!vtx || !ids) return;
|
|
|
|
/* temporary allocate normals + points */
|
|
vertex_offset = (nk_size)((nk_byte*)vtx - (nk_byte*)list->vertices->memory.ptr);
|
|
nk_buffer_mark(list->vertices, NK_BUFFER_FRONT);
|
|
size = pnt_size * ((thick_line) ? 5 : 3) * points_count;
|
|
normals = (struct nk_vec2*) nk_buffer_alloc(list->vertices, NK_BUFFER_FRONT, size, pnt_align);
|
|
if (!normals) return;
|
|
temp = normals + points_count;
|
|
|
|
/* make sure vertex pointer is still correct */
|
|
vtx = (void*)((nk_byte*)list->vertices->memory.ptr + vertex_offset);
|
|
|
|
/* calculate normals */
|
|
for (i1 = 0; i1 < count; ++i1) {
|
|
const nk_size i2 = ((i1 + 1) == points_count) ? 0 : (i1 + 1);
|
|
struct nk_vec2 diff = nk_vec2_sub(points[i2], points[i1]);
|
|
float len;
|
|
|
|
/* vec2 inverted length */
|
|
len = nk_vec2_len_sqr(diff);
|
|
if (len != 0.0f)
|
|
len = NK_INV_SQRT(len);
|
|
else len = 1.0f;
|
|
|
|
diff = nk_vec2_muls(diff, len);
|
|
normals[i1].x = diff.y;
|
|
normals[i1].y = -diff.x;
|
|
}
|
|
|
|
if (!closed)
|
|
normals[points_count-1] = normals[points_count-2];
|
|
|
|
if (!thick_line) {
|
|
nk_size idx1, i;
|
|
if (!closed) {
|
|
struct nk_vec2 d;
|
|
temp[0] = nk_vec2_add(points[0], nk_vec2_muls(normals[0], AA_SIZE));
|
|
temp[1] = nk_vec2_sub(points[0], nk_vec2_muls(normals[0], AA_SIZE));
|
|
d = nk_vec2_muls(normals[points_count-1], AA_SIZE);
|
|
temp[(points_count-1) * 2 + 0] = nk_vec2_add(points[points_count-1], d);
|
|
temp[(points_count-1) * 2 + 1] = nk_vec2_sub(points[points_count-1], d);
|
|
}
|
|
|
|
/* fill elements */
|
|
idx1 = index;
|
|
for (i1 = 0; i1 < count; i1++) {
|
|
struct nk_vec2 dm;
|
|
float dmr2;
|
|
nk_size i2 = ((i1 + 1) == points_count) ? 0 : (i1 + 1);
|
|
nk_size idx2 = ((i1+1) == points_count) ? index: (idx1 + 3);
|
|
|
|
/* average normals */
|
|
dm = nk_vec2_muls(nk_vec2_add(normals[i1], normals[i2]), 0.5f);
|
|
dmr2 = dm.x * dm.x + dm.y* dm.y;
|
|
if (dmr2 > 0.000001f) {
|
|
float scale = 1.0f/dmr2;
|
|
scale = NK_MIN(100.0f, scale);
|
|
dm = nk_vec2_muls(dm, scale);
|
|
}
|
|
|
|
dm = nk_vec2_muls(dm, AA_SIZE);
|
|
temp[i2*2+0] = nk_vec2_add(points[i2], dm);
|
|
temp[i2*2+1] = nk_vec2_sub(points[i2], dm);
|
|
|
|
ids[0] = (nk_draw_index)(idx2 + 0); ids[1] = (nk_draw_index)(idx1+0);
|
|
ids[2] = (nk_draw_index)(idx1 + 2); ids[3] = (nk_draw_index)(idx1+2);
|
|
ids[4] = (nk_draw_index)(idx2 + 2); ids[5] = (nk_draw_index)(idx2+0);
|
|
ids[6] = (nk_draw_index)(idx2 + 1); ids[7] = (nk_draw_index)(idx1+1);
|
|
ids[8] = (nk_draw_index)(idx1 + 0); ids[9] = (nk_draw_index)(idx1+0);
|
|
ids[10]= (nk_draw_index)(idx2 + 0); ids[11]= (nk_draw_index)(idx2+1);
|
|
ids += 12;
|
|
idx1 = idx2;
|
|
}
|
|
|
|
/* fill vertices */
|
|
for (i = 0; i < points_count; ++i) {
|
|
const struct nk_vec2 uv = list->config.null.uv;
|
|
vtx = nk_draw_vertex(vtx, &list->config, points[i], uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, temp[i*2+0], uv, col_trans);
|
|
vtx = nk_draw_vertex(vtx, &list->config, temp[i*2+1], uv, col_trans);
|
|
}
|
|
} else {
|
|
nk_size idx1, i;
|
|
const float half_inner_thickness = (thickness - AA_SIZE) * 0.5f;
|
|
if (!closed) {
|
|
struct nk_vec2 d1 = nk_vec2_muls(normals[0], half_inner_thickness + AA_SIZE);
|
|
struct nk_vec2 d2 = nk_vec2_muls(normals[0], half_inner_thickness);
|
|
|
|
temp[0] = nk_vec2_add(points[0], d1);
|
|
temp[1] = nk_vec2_add(points[0], d2);
|
|
temp[2] = nk_vec2_sub(points[0], d2);
|
|
temp[3] = nk_vec2_sub(points[0], d1);
|
|
|
|
d1 = nk_vec2_muls(normals[points_count-1], half_inner_thickness + AA_SIZE);
|
|
d2 = nk_vec2_muls(normals[points_count-1], half_inner_thickness);
|
|
|
|
temp[(points_count-1)*4+0] = nk_vec2_add(points[points_count-1], d1);
|
|
temp[(points_count-1)*4+1] = nk_vec2_add(points[points_count-1], d2);
|
|
temp[(points_count-1)*4+2] = nk_vec2_sub(points[points_count-1], d2);
|
|
temp[(points_count-1)*4+3] = nk_vec2_sub(points[points_count-1], d1);
|
|
}
|
|
|
|
/* add all elements */
|
|
idx1 = index;
|
|
for (i1 = 0; i1 < count; ++i1) {
|
|
struct nk_vec2 dm_out, dm_in;
|
|
const nk_size i2 = ((i1+1) == points_count) ? 0: (i1 + 1);
|
|
nk_size idx2 = ((i1+1) == points_count) ? index: (idx1 + 4);
|
|
|
|
/* average normals */
|
|
struct nk_vec2 dm = nk_vec2_muls(nk_vec2_add(normals[i1], normals[i2]), 0.5f);
|
|
float dmr2 = dm.x * dm.x + dm.y* dm.y;
|
|
if (dmr2 > 0.000001f) {
|
|
float scale = 1.0f/dmr2;
|
|
scale = NK_MIN(100.0f, scale);
|
|
dm = nk_vec2_muls(dm, scale);
|
|
}
|
|
|
|
dm_out = nk_vec2_muls(dm, ((half_inner_thickness) + AA_SIZE));
|
|
dm_in = nk_vec2_muls(dm, half_inner_thickness);
|
|
temp[i2*4+0] = nk_vec2_add(points[i2], dm_out);
|
|
temp[i2*4+1] = nk_vec2_add(points[i2], dm_in);
|
|
temp[i2*4+2] = nk_vec2_sub(points[i2], dm_in);
|
|
temp[i2*4+3] = nk_vec2_sub(points[i2], dm_out);
|
|
|
|
/* add indexes */
|
|
ids[0] = (nk_draw_index)(idx2 + 1); ids[1] = (nk_draw_index)(idx1+1);
|
|
ids[2] = (nk_draw_index)(idx1 + 2); ids[3] = (nk_draw_index)(idx1+2);
|
|
ids[4] = (nk_draw_index)(idx2 + 2); ids[5] = (nk_draw_index)(idx2+1);
|
|
ids[6] = (nk_draw_index)(idx2 + 1); ids[7] = (nk_draw_index)(idx1+1);
|
|
ids[8] = (nk_draw_index)(idx1 + 0); ids[9] = (nk_draw_index)(idx1+0);
|
|
ids[10]= (nk_draw_index)(idx2 + 0); ids[11] = (nk_draw_index)(idx2+1);
|
|
ids[12]= (nk_draw_index)(idx2 + 2); ids[13] = (nk_draw_index)(idx1+2);
|
|
ids[14]= (nk_draw_index)(idx1 + 3); ids[15] = (nk_draw_index)(idx1+3);
|
|
ids[16]= (nk_draw_index)(idx2 + 3); ids[17] = (nk_draw_index)(idx2+2);
|
|
ids += 18;
|
|
idx1 = idx2;
|
|
}
|
|
|
|
/* add vertices */
|
|
for (i = 0; i < points_count; ++i) {
|
|
const struct nk_vec2 uv = list->config.null.uv;
|
|
vtx = nk_draw_vertex(vtx, &list->config, temp[i*4+0], uv, col_trans);
|
|
vtx = nk_draw_vertex(vtx, &list->config, temp[i*4+1], uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, temp[i*4+2], uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, temp[i*4+3], uv, col_trans);
|
|
}
|
|
}
|
|
/* free temporary normals + points */
|
|
nk_buffer_reset(list->vertices, NK_BUFFER_FRONT);
|
|
} else {
|
|
/* NON ANTI-ALIASED STROKE */
|
|
nk_size i1 = 0;
|
|
nk_size idx = list->vertex_count;
|
|
const nk_size idx_count = count * 6;
|
|
const nk_size vtx_count = count * 4;
|
|
void *vtx = nk_draw_list_alloc_vertices(list, vtx_count);
|
|
nk_draw_index *ids = nk_draw_list_alloc_elements(list, idx_count);
|
|
if (!vtx || !ids) return;
|
|
|
|
for (i1 = 0; i1 < count; ++i1) {
|
|
float dx, dy;
|
|
const struct nk_vec2 uv = list->config.null.uv;
|
|
const nk_size i2 = ((i1+1) == points_count) ? 0 : i1 + 1;
|
|
const struct nk_vec2 p1 = points[i1];
|
|
const struct nk_vec2 p2 = points[i2];
|
|
struct nk_vec2 diff = nk_vec2_sub(p2, p1);
|
|
float len;
|
|
|
|
/* vec2 inverted length */
|
|
len = nk_vec2_len_sqr(diff);
|
|
if (len != 0.0f)
|
|
len = NK_INV_SQRT(len);
|
|
else len = 1.0f;
|
|
diff = nk_vec2_muls(diff, len);
|
|
|
|
/* add vertices */
|
|
dx = diff.x * (thickness * 0.5f);
|
|
dy = diff.y * (thickness * 0.5f);
|
|
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(p1.x + dy, p1.y - dx), uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(p2.x + dy, p2.y - dx), uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(p2.x - dy, p2.y + dx), uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(p1.x - dy, p1.y + dx), uv, col);
|
|
|
|
ids[0] = (nk_draw_index)(idx+0); ids[1] = (nk_draw_index)(idx+1);
|
|
ids[2] = (nk_draw_index)(idx+2); ids[3] = (nk_draw_index)(idx+0);
|
|
ids[4] = (nk_draw_index)(idx+2); ids[5] = (nk_draw_index)(idx+3);
|
|
|
|
ids += 6;
|
|
idx += 4;
|
|
}
|
|
}
|
|
}
|
|
NK_API void
|
|
nk_draw_list_fill_poly_convex(struct nk_draw_list *list,
|
|
const struct nk_vec2 *points, const unsigned int points_count,
|
|
struct nk_color color, enum nk_anti_aliasing aliasing)
|
|
{
|
|
struct nk_colorf col;
|
|
struct nk_colorf col_trans;
|
|
|
|
NK_STORAGE const nk_size pnt_align = NK_ALIGNOF(struct nk_vec2);
|
|
NK_STORAGE const nk_size pnt_size = sizeof(struct nk_vec2);
|
|
NK_ASSERT(list);
|
|
if (!list || points_count < 3) return;
|
|
|
|
#ifdef NK_INCLUDE_COMMAND_USERDATA
|
|
nk_draw_list_push_userdata(list, list->userdata);
|
|
#endif
|
|
|
|
color.a = (nk_byte)((float)color.a * list->config.global_alpha);
|
|
nk_color_fv(&col.r, color);
|
|
col_trans = col;
|
|
col_trans.a = 0;
|
|
|
|
if (aliasing == NK_ANTI_ALIASING_ON) {
|
|
nk_size i = 0;
|
|
nk_size i0 = 0;
|
|
nk_size i1 = 0;
|
|
|
|
const float AA_SIZE = 1.0f;
|
|
nk_size vertex_offset = 0;
|
|
nk_size index = list->vertex_count;
|
|
|
|
const nk_size idx_count = (points_count-2)*3 + points_count*6;
|
|
const nk_size vtx_count = (points_count*2);
|
|
|
|
void *vtx = nk_draw_list_alloc_vertices(list, vtx_count);
|
|
nk_draw_index *ids = nk_draw_list_alloc_elements(list, idx_count);
|
|
|
|
nk_size size = 0;
|
|
struct nk_vec2 *normals = 0;
|
|
unsigned int vtx_inner_idx = (unsigned int)(index + 0);
|
|
unsigned int vtx_outer_idx = (unsigned int)(index + 1);
|
|
if (!vtx || !ids) return;
|
|
|
|
/* temporary allocate normals */
|
|
vertex_offset = (nk_size)((nk_byte*)vtx - (nk_byte*)list->vertices->memory.ptr);
|
|
nk_buffer_mark(list->vertices, NK_BUFFER_FRONT);
|
|
size = pnt_size * points_count;
|
|
normals = (struct nk_vec2*) nk_buffer_alloc(list->vertices, NK_BUFFER_FRONT, size, pnt_align);
|
|
if (!normals) return;
|
|
vtx = (void*)((nk_byte*)list->vertices->memory.ptr + vertex_offset);
|
|
|
|
/* add elements */
|
|
for (i = 2; i < points_count; i++) {
|
|
ids[0] = (nk_draw_index)(vtx_inner_idx);
|
|
ids[1] = (nk_draw_index)(vtx_inner_idx + ((i-1) << 1));
|
|
ids[2] = (nk_draw_index)(vtx_inner_idx + (i << 1));
|
|
ids += 3;
|
|
}
|
|
|
|
/* compute normals */
|
|
for (i0 = points_count-1, i1 = 0; i1 < points_count; i0 = i1++) {
|
|
struct nk_vec2 p0 = points[i0];
|
|
struct nk_vec2 p1 = points[i1];
|
|
struct nk_vec2 diff = nk_vec2_sub(p1, p0);
|
|
|
|
/* vec2 inverted length */
|
|
float len = nk_vec2_len_sqr(diff);
|
|
if (len != 0.0f)
|
|
len = NK_INV_SQRT(len);
|
|
else len = 1.0f;
|
|
diff = nk_vec2_muls(diff, len);
|
|
|
|
normals[i0].x = diff.y;
|
|
normals[i0].y = -diff.x;
|
|
}
|
|
|
|
/* add vertices + indexes */
|
|
for (i0 = points_count-1, i1 = 0; i1 < points_count; i0 = i1++) {
|
|
const struct nk_vec2 uv = list->config.null.uv;
|
|
struct nk_vec2 n0 = normals[i0];
|
|
struct nk_vec2 n1 = normals[i1];
|
|
struct nk_vec2 dm = nk_vec2_muls(nk_vec2_add(n0, n1), 0.5f);
|
|
float dmr2 = dm.x*dm.x + dm.y*dm.y;
|
|
if (dmr2 > 0.000001f) {
|
|
float scale = 1.0f / dmr2;
|
|
scale = NK_MIN(scale, 100.0f);
|
|
dm = nk_vec2_muls(dm, scale);
|
|
}
|
|
dm = nk_vec2_muls(dm, AA_SIZE * 0.5f);
|
|
|
|
/* add vertices */
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2_sub(points[i1], dm), uv, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2_add(points[i1], dm), uv, col_trans);
|
|
|
|
/* add indexes */
|
|
ids[0] = (nk_draw_index)(vtx_inner_idx+(i1<<1));
|
|
ids[1] = (nk_draw_index)(vtx_inner_idx+(i0<<1));
|
|
ids[2] = (nk_draw_index)(vtx_outer_idx+(i0<<1));
|
|
ids[3] = (nk_draw_index)(vtx_outer_idx+(i0<<1));
|
|
ids[4] = (nk_draw_index)(vtx_outer_idx+(i1<<1));
|
|
ids[5] = (nk_draw_index)(vtx_inner_idx+(i1<<1));
|
|
ids += 6;
|
|
}
|
|
/* free temporary normals + points */
|
|
nk_buffer_reset(list->vertices, NK_BUFFER_FRONT);
|
|
} else {
|
|
nk_size i = 0;
|
|
nk_size index = list->vertex_count;
|
|
const nk_size idx_count = (points_count-2)*3;
|
|
const nk_size vtx_count = points_count;
|
|
void *vtx = nk_draw_list_alloc_vertices(list, vtx_count);
|
|
nk_draw_index *ids = nk_draw_list_alloc_elements(list, idx_count);
|
|
|
|
if (!vtx || !ids) return;
|
|
for (i = 0; i < vtx_count; ++i)
|
|
vtx = nk_draw_vertex(vtx, &list->config, points[i], list->config.null.uv, col);
|
|
for (i = 2; i < points_count; ++i) {
|
|
ids[0] = (nk_draw_index)index;
|
|
ids[1] = (nk_draw_index)(index+ i - 1);
|
|
ids[2] = (nk_draw_index)(index+i);
|
|
ids += 3;
|
|
}
|
|
}
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_clear(struct nk_draw_list *list)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
nk_buffer_reset(list->buffer, NK_BUFFER_FRONT);
|
|
list->path_count = 0;
|
|
list->path_offset = 0;
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_line_to(struct nk_draw_list *list, struct nk_vec2 pos)
|
|
{
|
|
struct nk_vec2 *points = 0;
|
|
struct nk_draw_command *cmd = 0;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
if (!list->cmd_count)
|
|
nk_draw_list_add_clip(list, nk_null_rect);
|
|
|
|
cmd = nk_draw_list_command_last(list);
|
|
if (cmd && cmd->texture.ptr != list->config.null.texture.ptr)
|
|
nk_draw_list_push_image(list, list->config.null.texture);
|
|
|
|
points = nk_draw_list_alloc_path(list, 1);
|
|
if (!points) return;
|
|
points[0] = pos;
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_arc_to_fast(struct nk_draw_list *list, struct nk_vec2 center,
|
|
float radius, int a_min, int a_max)
|
|
{
|
|
int a = 0;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
if (a_min <= a_max) {
|
|
for (a = a_min; a <= a_max; a++) {
|
|
const struct nk_vec2 c = list->circle_vtx[(nk_size)a % NK_LEN(list->circle_vtx)];
|
|
const float x = center.x + c.x * radius;
|
|
const float y = center.y + c.y * radius;
|
|
nk_draw_list_path_line_to(list, nk_vec2(x, y));
|
|
}
|
|
}
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_arc_to(struct nk_draw_list *list, struct nk_vec2 center,
|
|
float radius, float a_min, float a_max, unsigned int segments)
|
|
{
|
|
unsigned int i = 0;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
if (radius == 0.0f) return;
|
|
|
|
/* This algorithm for arc drawing relies on these two trigonometric identities[1]:
|
|
sin(a + b) = sin(a) * cos(b) + cos(a) * sin(b)
|
|
cos(a + b) = cos(a) * cos(b) - sin(a) * sin(b)
|
|
|
|
Two coordinates (x, y) of a point on a circle centered on
|
|
the origin can be written in polar form as:
|
|
x = r * cos(a)
|
|
y = r * sin(a)
|
|
where r is the radius of the circle,
|
|
a is the angle between (x, y) and the origin.
|
|
|
|
This allows us to rotate the coordinates around the
|
|
origin by an angle b using the following transformation:
|
|
x' = r * cos(a + b) = x * cos(b) - y * sin(b)
|
|
y' = r * sin(a + b) = y * cos(b) + x * sin(b)
|
|
|
|
[1] https://en.wikipedia.org/wiki/List_of_trigonometric_identities#Angle_sum_and_difference_identities
|
|
*/
|
|
{const float d_angle = (a_max - a_min) / (float)segments;
|
|
const float sin_d = (float)NK_SIN(d_angle);
|
|
const float cos_d = (float)NK_COS(d_angle);
|
|
|
|
float cx = (float)NK_COS(a_min) * radius;
|
|
float cy = (float)NK_SIN(a_min) * radius;
|
|
for(i = 0; i <= segments; ++i) {
|
|
float new_cx, new_cy;
|
|
const float x = center.x + cx;
|
|
const float y = center.y + cy;
|
|
nk_draw_list_path_line_to(list, nk_vec2(x, y));
|
|
|
|
new_cx = cx * cos_d - cy * sin_d;
|
|
new_cy = cy * cos_d + cx * sin_d;
|
|
cx = new_cx;
|
|
cy = new_cy;
|
|
}}
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_rect_to(struct nk_draw_list *list, struct nk_vec2 a,
|
|
struct nk_vec2 b, float rounding)
|
|
{
|
|
float r;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
r = rounding;
|
|
r = NK_MIN(r, ((b.x-a.x) < 0) ? -(b.x-a.x): (b.x-a.x));
|
|
r = NK_MIN(r, ((b.y-a.y) < 0) ? -(b.y-a.y): (b.y-a.y));
|
|
|
|
if (r == 0.0f) {
|
|
nk_draw_list_path_line_to(list, a);
|
|
nk_draw_list_path_line_to(list, nk_vec2(b.x,a.y));
|
|
nk_draw_list_path_line_to(list, b);
|
|
nk_draw_list_path_line_to(list, nk_vec2(a.x,b.y));
|
|
} else {
|
|
nk_draw_list_path_arc_to_fast(list, nk_vec2(a.x + r, a.y + r), r, 6, 9);
|
|
nk_draw_list_path_arc_to_fast(list, nk_vec2(b.x - r, a.y + r), r, 9, 12);
|
|
nk_draw_list_path_arc_to_fast(list, nk_vec2(b.x - r, b.y - r), r, 0, 3);
|
|
nk_draw_list_path_arc_to_fast(list, nk_vec2(a.x + r, b.y - r), r, 3, 6);
|
|
}
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_curve_to(struct nk_draw_list *list, struct nk_vec2 p2,
|
|
struct nk_vec2 p3, struct nk_vec2 p4, unsigned int num_segments)
|
|
{
|
|
float t_step;
|
|
unsigned int i_step;
|
|
struct nk_vec2 p1;
|
|
|
|
NK_ASSERT(list);
|
|
NK_ASSERT(list->path_count);
|
|
if (!list || !list->path_count) return;
|
|
num_segments = NK_MAX(num_segments, 1);
|
|
|
|
p1 = nk_draw_list_path_last(list);
|
|
t_step = 1.0f/(float)num_segments;
|
|
for (i_step = 1; i_step <= num_segments; ++i_step) {
|
|
float t = t_step * (float)i_step;
|
|
float u = 1.0f - t;
|
|
float w1 = u*u*u;
|
|
float w2 = 3*u*u*t;
|
|
float w3 = 3*u*t*t;
|
|
float w4 = t * t *t;
|
|
float x = w1 * p1.x + w2 * p2.x + w3 * p3.x + w4 * p4.x;
|
|
float y = w1 * p1.y + w2 * p2.y + w3 * p3.y + w4 * p4.y;
|
|
nk_draw_list_path_line_to(list, nk_vec2(x,y));
|
|
}
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_fill(struct nk_draw_list *list, struct nk_color color)
|
|
{
|
|
struct nk_vec2 *points;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
points = (struct nk_vec2*)nk_buffer_memory(list->buffer);
|
|
nk_draw_list_fill_poly_convex(list, points, list->path_count, color, list->config.shape_AA);
|
|
nk_draw_list_path_clear(list);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_path_stroke(struct nk_draw_list *list, struct nk_color color,
|
|
enum nk_draw_list_stroke closed, float thickness)
|
|
{
|
|
struct nk_vec2 *points;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
points = (struct nk_vec2*)nk_buffer_memory(list->buffer);
|
|
nk_draw_list_stroke_poly_line(list, points, list->path_count, color,
|
|
closed, thickness, list->config.line_AA);
|
|
nk_draw_list_path_clear(list);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_stroke_line(struct nk_draw_list *list, struct nk_vec2 a,
|
|
struct nk_vec2 b, struct nk_color col, float thickness)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
if (list->line_AA == NK_ANTI_ALIASING_ON) {
|
|
nk_draw_list_path_line_to(list, a);
|
|
nk_draw_list_path_line_to(list, b);
|
|
} else {
|
|
nk_draw_list_path_line_to(list, nk_vec2_sub(a,nk_vec2(0.5f,0.5f)));
|
|
nk_draw_list_path_line_to(list, nk_vec2_sub(b,nk_vec2(0.5f,0.5f)));
|
|
}
|
|
nk_draw_list_path_stroke(list, col, NK_STROKE_OPEN, thickness);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_fill_rect(struct nk_draw_list *list, struct nk_rect rect,
|
|
struct nk_color col, float rounding)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
|
|
if (list->line_AA == NK_ANTI_ALIASING_ON) {
|
|
nk_draw_list_path_rect_to(list, nk_vec2(rect.x, rect.y),
|
|
nk_vec2(rect.x + rect.w, rect.y + rect.h), rounding);
|
|
} else {
|
|
nk_draw_list_path_rect_to(list, nk_vec2(rect.x-0.5f, rect.y-0.5f),
|
|
nk_vec2(rect.x + rect.w, rect.y + rect.h), rounding);
|
|
} nk_draw_list_path_fill(list, col);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_stroke_rect(struct nk_draw_list *list, struct nk_rect rect,
|
|
struct nk_color col, float rounding, float thickness)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
if (list->line_AA == NK_ANTI_ALIASING_ON) {
|
|
nk_draw_list_path_rect_to(list, nk_vec2(rect.x, rect.y),
|
|
nk_vec2(rect.x + rect.w, rect.y + rect.h), rounding);
|
|
} else {
|
|
nk_draw_list_path_rect_to(list, nk_vec2(rect.x-0.5f, rect.y-0.5f),
|
|
nk_vec2(rect.x + rect.w, rect.y + rect.h), rounding);
|
|
} nk_draw_list_path_stroke(list, col, NK_STROKE_CLOSED, thickness);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_fill_rect_multi_color(struct nk_draw_list *list, struct nk_rect rect,
|
|
struct nk_color left, struct nk_color top, struct nk_color right,
|
|
struct nk_color bottom)
|
|
{
|
|
void *vtx;
|
|
struct nk_colorf col_left, col_top;
|
|
struct nk_colorf col_right, col_bottom;
|
|
nk_draw_index *idx;
|
|
nk_draw_index index;
|
|
|
|
nk_color_fv(&col_left.r, left);
|
|
nk_color_fv(&col_right.r, right);
|
|
nk_color_fv(&col_top.r, top);
|
|
nk_color_fv(&col_bottom.r, bottom);
|
|
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
|
|
nk_draw_list_push_image(list, list->config.null.texture);
|
|
index = (nk_draw_index)list->vertex_count;
|
|
vtx = nk_draw_list_alloc_vertices(list, 4);
|
|
idx = nk_draw_list_alloc_elements(list, 6);
|
|
if (!vtx || !idx) return;
|
|
|
|
idx[0] = (nk_draw_index)(index+0); idx[1] = (nk_draw_index)(index+1);
|
|
idx[2] = (nk_draw_index)(index+2); idx[3] = (nk_draw_index)(index+0);
|
|
idx[4] = (nk_draw_index)(index+2); idx[5] = (nk_draw_index)(index+3);
|
|
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(rect.x, rect.y), list->config.null.uv, col_left);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(rect.x + rect.w, rect.y), list->config.null.uv, col_top);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(rect.x + rect.w, rect.y + rect.h), list->config.null.uv, col_right);
|
|
vtx = nk_draw_vertex(vtx, &list->config, nk_vec2(rect.x, rect.y + rect.h), list->config.null.uv, col_bottom);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_fill_triangle(struct nk_draw_list *list, struct nk_vec2 a,
|
|
struct nk_vec2 b, struct nk_vec2 c, struct nk_color col)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
nk_draw_list_path_line_to(list, a);
|
|
nk_draw_list_path_line_to(list, b);
|
|
nk_draw_list_path_line_to(list, c);
|
|
nk_draw_list_path_fill(list, col);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_stroke_triangle(struct nk_draw_list *list, struct nk_vec2 a,
|
|
struct nk_vec2 b, struct nk_vec2 c, struct nk_color col, float thickness)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
nk_draw_list_path_line_to(list, a);
|
|
nk_draw_list_path_line_to(list, b);
|
|
nk_draw_list_path_line_to(list, c);
|
|
nk_draw_list_path_stroke(list, col, NK_STROKE_CLOSED, thickness);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_fill_circle(struct nk_draw_list *list, struct nk_vec2 center,
|
|
float radius, struct nk_color col, unsigned int segs)
|
|
{
|
|
float a_max;
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
a_max = NK_PI * 2.0f * ((float)segs - 1.0f) / (float)segs;
|
|
nk_draw_list_path_arc_to(list, center, radius, 0.0f, a_max, segs);
|
|
nk_draw_list_path_fill(list, col);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_stroke_circle(struct nk_draw_list *list, struct nk_vec2 center,
|
|
float radius, struct nk_color col, unsigned int segs, float thickness)
|
|
{
|
|
float a_max;
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
a_max = NK_PI * 2.0f * ((float)segs - 1.0f) / (float)segs;
|
|
nk_draw_list_path_arc_to(list, center, radius, 0.0f, a_max, segs);
|
|
nk_draw_list_path_stroke(list, col, NK_STROKE_CLOSED, thickness);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_stroke_curve(struct nk_draw_list *list, struct nk_vec2 p0,
|
|
struct nk_vec2 cp0, struct nk_vec2 cp1, struct nk_vec2 p1,
|
|
struct nk_color col, unsigned int segments, float thickness)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list || !col.a) return;
|
|
nk_draw_list_path_line_to(list, p0);
|
|
nk_draw_list_path_curve_to(list, cp0, cp1, p1, segments);
|
|
nk_draw_list_path_stroke(list, col, NK_STROKE_OPEN, thickness);
|
|
}
|
|
NK_INTERN void
|
|
nk_draw_list_push_rect_uv(struct nk_draw_list *list, struct nk_vec2 a,
|
|
struct nk_vec2 c, struct nk_vec2 uva, struct nk_vec2 uvc,
|
|
struct nk_color color)
|
|
{
|
|
void *vtx;
|
|
struct nk_vec2 uvb;
|
|
struct nk_vec2 uvd;
|
|
struct nk_vec2 b;
|
|
struct nk_vec2 d;
|
|
|
|
struct nk_colorf col;
|
|
nk_draw_index *idx;
|
|
nk_draw_index index;
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
|
|
nk_color_fv(&col.r, color);
|
|
uvb = nk_vec2(uvc.x, uva.y);
|
|
uvd = nk_vec2(uva.x, uvc.y);
|
|
b = nk_vec2(c.x, a.y);
|
|
d = nk_vec2(a.x, c.y);
|
|
|
|
index = (nk_draw_index)list->vertex_count;
|
|
vtx = nk_draw_list_alloc_vertices(list, 4);
|
|
idx = nk_draw_list_alloc_elements(list, 6);
|
|
if (!vtx || !idx) return;
|
|
|
|
idx[0] = (nk_draw_index)(index+0); idx[1] = (nk_draw_index)(index+1);
|
|
idx[2] = (nk_draw_index)(index+2); idx[3] = (nk_draw_index)(index+0);
|
|
idx[4] = (nk_draw_index)(index+2); idx[5] = (nk_draw_index)(index+3);
|
|
|
|
vtx = nk_draw_vertex(vtx, &list->config, a, uva, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, b, uvb, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, c, uvc, col);
|
|
vtx = nk_draw_vertex(vtx, &list->config, d, uvd, col);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_add_image(struct nk_draw_list *list, struct nk_image texture,
|
|
struct nk_rect rect, struct nk_color color)
|
|
{
|
|
NK_ASSERT(list);
|
|
if (!list) return;
|
|
/* push new command with given texture */
|
|
nk_draw_list_push_image(list, texture.handle);
|
|
if (nk_image_is_subimage(&texture)) {
|
|
/* add region inside of the texture */
|
|
struct nk_vec2 uv[2];
|
|
uv[0].x = (float)texture.region[0]/(float)texture.w;
|
|
uv[0].y = (float)texture.region[1]/(float)texture.h;
|
|
uv[1].x = (float)(texture.region[0] + texture.region[2])/(float)texture.w;
|
|
uv[1].y = (float)(texture.region[1] + texture.region[3])/(float)texture.h;
|
|
nk_draw_list_push_rect_uv(list, nk_vec2(rect.x, rect.y),
|
|
nk_vec2(rect.x + rect.w, rect.y + rect.h), uv[0], uv[1], color);
|
|
} else nk_draw_list_push_rect_uv(list, nk_vec2(rect.x, rect.y),
|
|
nk_vec2(rect.x + rect.w, rect.y + rect.h),
|
|
nk_vec2(0.0f, 0.0f), nk_vec2(1.0f, 1.0f),color);
|
|
}
|
|
NK_API void
|
|
nk_draw_list_add_text(struct nk_draw_list *list, const struct nk_user_font *font,
|
|
struct nk_rect rect, const char *text, int len, float font_height,
|
|
struct nk_color fg)
|
|
{
|
|
float x = 0;
|
|
int text_len = 0;
|
|
nk_rune unicode = 0;
|
|
nk_rune next = 0;
|
|
int glyph_len = 0;
|
|
int next_glyph_len = 0;
|
|
struct nk_user_font_glyph g;
|
|
|
|
NK_ASSERT(list);
|
|
if (!list || !len || !text) return;
|
|
if (!NK_INTERSECT(rect.x, rect.y, rect.w, rect.h,
|
|
list->clip_rect.x, list->clip_rect.y, list->clip_rect.w, list->clip_rect.h)) return;
|
|
|
|
nk_draw_list_push_image(list, font->texture);
|
|
x = rect.x;
|
|
glyph_len = nk_utf_decode(text, &unicode, len);
|
|
if (!glyph_len) return;
|
|
|
|
/* draw every glyph image */
|
|
fg.a = (nk_byte)((float)fg.a * list->config.global_alpha);
|
|
while (text_len < len && glyph_len) {
|
|
float gx, gy, gh, gw;
|
|
float char_width = 0;
|
|
if (unicode == NK_UTF_INVALID) break;
|
|
|
|
/* query currently drawn glyph information */
|
|
next_glyph_len = nk_utf_decode(text + text_len + glyph_len, &next, (int)len - text_len);
|
|
font->query(font->userdata, font_height, &g, unicode,
|
|
(next == NK_UTF_INVALID) ? '\0' : next);
|
|
|
|
/* calculate and draw glyph drawing rectangle and image */
|
|
gx = x + g.offset.x;
|
|
gy = rect.y + g.offset.y;
|
|
gw = g.width; gh = g.height;
|
|
char_width = g.xadvance;
|
|
nk_draw_list_push_rect_uv(list, nk_vec2(gx,gy), nk_vec2(gx + gw, gy+ gh),
|
|
g.uv[0], g.uv[1], fg);
|
|
|
|
/* offset next glyph */
|
|
text_len += glyph_len;
|
|
x += char_width;
|
|
glyph_len = next_glyph_len;
|
|
unicode = next;
|
|
}
|
|
}
|
|
NK_API nk_flags
|
|
nk_convert(struct nk_context *ctx, struct nk_buffer *cmds,
|
|
struct nk_buffer *vertices, struct nk_buffer *elements,
|
|
const struct nk_convert_config *config)
|
|
{
|
|
nk_flags res = NK_CONVERT_SUCCESS;
|
|
const struct nk_command *cmd;
|
|
NK_ASSERT(ctx);
|
|
NK_ASSERT(cmds);
|
|
NK_ASSERT(vertices);
|
|
NK_ASSERT(elements);
|
|
NK_ASSERT(config);
|
|
NK_ASSERT(config->vertex_layout);
|
|
NK_ASSERT(config->vertex_size);
|
|
if (!ctx || !cmds || !vertices || !elements || !config || !config->vertex_layout)
|
|
return NK_CONVERT_INVALID_PARAM;
|
|
|
|
nk_draw_list_setup(&ctx->draw_list, config, cmds, vertices, elements,
|
|
config->line_AA, config->shape_AA);
|
|
nk_foreach(cmd, ctx)
|
|
{
|
|
#ifdef NK_INCLUDE_COMMAND_USERDATA
|
|
ctx->draw_list.userdata = cmd->userdata;
|
|
#endif
|
|
switch (cmd->type) {
|
|
case NK_COMMAND_NOP: break;
|
|
case NK_COMMAND_SCISSOR: {
|
|
const struct nk_command_scissor *s = (const struct nk_command_scissor*)cmd;
|
|
nk_draw_list_add_clip(&ctx->draw_list, nk_rect(s->x, s->y, s->w, s->h));
|
|
} break;
|
|
case NK_COMMAND_LINE: {
|
|
const struct nk_command_line *l = (const struct nk_command_line*)cmd;
|
|
nk_draw_list_stroke_line(&ctx->draw_list, nk_vec2(l->begin.x, l->begin.y),
|
|
nk_vec2(l->end.x, l->end.y), l->color, l->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_CURVE: {
|
|
const struct nk_command_curve *q = (const struct nk_command_curve*)cmd;
|
|
nk_draw_list_stroke_curve(&ctx->draw_list, nk_vec2(q->begin.x, q->begin.y),
|
|
nk_vec2(q->ctrl[0].x, q->ctrl[0].y), nk_vec2(q->ctrl[1].x,
|
|
q->ctrl[1].y), nk_vec2(q->end.x, q->end.y), q->color,
|
|
config->curve_segment_count, q->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_RECT: {
|
|
const struct nk_command_rect *r = (const struct nk_command_rect*)cmd;
|
|
nk_draw_list_stroke_rect(&ctx->draw_list, nk_rect(r->x, r->y, r->w, r->h),
|
|
r->color, (float)r->rounding, r->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_RECT_FILLED: {
|
|
const struct nk_command_rect_filled *r = (const struct nk_command_rect_filled*)cmd;
|
|
nk_draw_list_fill_rect(&ctx->draw_list, nk_rect(r->x, r->y, r->w, r->h),
|
|
r->color, (float)r->rounding);
|
|
} break;
|
|
case NK_COMMAND_RECT_MULTI_COLOR: {
|
|
const struct nk_command_rect_multi_color *r = (const struct nk_command_rect_multi_color*)cmd;
|
|
nk_draw_list_fill_rect_multi_color(&ctx->draw_list, nk_rect(r->x, r->y, r->w, r->h),
|
|
r->left, r->top, r->right, r->bottom);
|
|
} break;
|
|
case NK_COMMAND_CIRCLE: {
|
|
const struct nk_command_circle *c = (const struct nk_command_circle*)cmd;
|
|
nk_draw_list_stroke_circle(&ctx->draw_list, nk_vec2((float)c->x + (float)c->w/2,
|
|
(float)c->y + (float)c->h/2), (float)c->w/2, c->color,
|
|
config->circle_segment_count, c->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_CIRCLE_FILLED: {
|
|
const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
|
|
nk_draw_list_fill_circle(&ctx->draw_list, nk_vec2((float)c->x + (float)c->w/2,
|
|
(float)c->y + (float)c->h/2), (float)c->w/2, c->color,
|
|
config->circle_segment_count);
|
|
} break;
|
|
case NK_COMMAND_ARC: {
|
|
const struct nk_command_arc *c = (const struct nk_command_arc*)cmd;
|
|
nk_draw_list_path_line_to(&ctx->draw_list, nk_vec2(c->cx, c->cy));
|
|
nk_draw_list_path_arc_to(&ctx->draw_list, nk_vec2(c->cx, c->cy), c->r,
|
|
c->a[0], c->a[1], config->arc_segment_count);
|
|
nk_draw_list_path_stroke(&ctx->draw_list, c->color, NK_STROKE_CLOSED, c->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_ARC_FILLED: {
|
|
const struct nk_command_arc_filled *c = (const struct nk_command_arc_filled*)cmd;
|
|
nk_draw_list_path_line_to(&ctx->draw_list, nk_vec2(c->cx, c->cy));
|
|
nk_draw_list_path_arc_to(&ctx->draw_list, nk_vec2(c->cx, c->cy), c->r,
|
|
c->a[0], c->a[1], config->arc_segment_count);
|
|
nk_draw_list_path_fill(&ctx->draw_list, c->color);
|
|
} break;
|
|
case NK_COMMAND_TRIANGLE: {
|
|
const struct nk_command_triangle *t = (const struct nk_command_triangle*)cmd;
|
|
nk_draw_list_stroke_triangle(&ctx->draw_list, nk_vec2(t->a.x, t->a.y),
|
|
nk_vec2(t->b.x, t->b.y), nk_vec2(t->c.x, t->c.y), t->color,
|
|
t->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_TRIANGLE_FILLED: {
|
|
const struct nk_command_triangle_filled *t = (const struct nk_command_triangle_filled*)cmd;
|
|
nk_draw_list_fill_triangle(&ctx->draw_list, nk_vec2(t->a.x, t->a.y),
|
|
nk_vec2(t->b.x, t->b.y), nk_vec2(t->c.x, t->c.y), t->color);
|
|
} break;
|
|
case NK_COMMAND_POLYGON: {
|
|
int i;
|
|
const struct nk_command_polygon*p = (const struct nk_command_polygon*)cmd;
|
|
for (i = 0; i < p->point_count; ++i) {
|
|
struct nk_vec2 pnt = nk_vec2((float)p->points[i].x, (float)p->points[i].y);
|
|
nk_draw_list_path_line_to(&ctx->draw_list, pnt);
|
|
}
|
|
nk_draw_list_path_stroke(&ctx->draw_list, p->color, NK_STROKE_CLOSED, p->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_POLYGON_FILLED: {
|
|
int i;
|
|
const struct nk_command_polygon_filled *p = (const struct nk_command_polygon_filled*)cmd;
|
|
for (i = 0; i < p->point_count; ++i) {
|
|
struct nk_vec2 pnt = nk_vec2((float)p->points[i].x, (float)p->points[i].y);
|
|
nk_draw_list_path_line_to(&ctx->draw_list, pnt);
|
|
}
|
|
nk_draw_list_path_fill(&ctx->draw_list, p->color);
|
|
} break;
|
|
case NK_COMMAND_POLYLINE: {
|
|
int i;
|
|
const struct nk_command_polyline *p = (const struct nk_command_polyline*)cmd;
|
|
for (i = 0; i < p->point_count; ++i) {
|
|
struct nk_vec2 pnt = nk_vec2((float)p->points[i].x, (float)p->points[i].y);
|
|
nk_draw_list_path_line_to(&ctx->draw_list, pnt);
|
|
}
|
|
nk_draw_list_path_stroke(&ctx->draw_list, p->color, NK_STROKE_OPEN, p->line_thickness);
|
|
} break;
|
|
case NK_COMMAND_TEXT: {
|
|
const struct nk_command_text *t = (const struct nk_command_text*)cmd;
|
|
nk_draw_list_add_text(&ctx->draw_list, t->font, nk_rect(t->x, t->y, t->w, t->h),
|
|
t->string, t->length, t->height, t->foreground);
|
|
} break;
|
|
case NK_COMMAND_IMAGE: {
|
|
const struct nk_command_image *i = (const struct nk_command_image*)cmd;
|
|
nk_draw_list_add_image(&ctx->draw_list, i->img, nk_rect(i->x, i->y, i->w, i->h), i->col);
|
|
} break;
|
|
case NK_COMMAND_CUSTOM: {
|
|
const struct nk_command_custom *c = (const struct nk_command_custom*)cmd;
|
|
c->callback(&ctx->draw_list, c->x, c->y, c->w, c->h, c->callback_data);
|
|
} break;
|
|
default: break;
|
|
}
|
|
}
|
|
res |= (cmds->needed > cmds->allocated + (cmds->memory.size - cmds->size)) ? NK_CONVERT_COMMAND_BUFFER_FULL: 0;
|
|
res |= (vertices->needed > vertices->allocated) ? NK_CONVERT_VERTEX_BUFFER_FULL: 0;
|
|
res |= (elements->needed > elements->allocated) ? NK_CONVERT_ELEMENT_BUFFER_FULL: 0;
|
|
return res;
|
|
}
|
|
NK_API const struct nk_draw_command*
|
|
nk__draw_begin(const struct nk_context *ctx,
|
|
const struct nk_buffer *buffer)
|
|
{
|
|
return nk__draw_list_begin(&ctx->draw_list, buffer);
|
|
}
|
|
NK_API const struct nk_draw_command*
|
|
nk__draw_end(const struct nk_context *ctx, const struct nk_buffer *buffer)
|
|
{
|
|
return nk__draw_list_end(&ctx->draw_list, buffer);
|
|
}
|
|
NK_API const struct nk_draw_command*
|
|
nk__draw_next(const struct nk_draw_command *cmd,
|
|
const struct nk_buffer *buffer, const struct nk_context *ctx)
|
|
{
|
|
return nk__draw_list_next(cmd, buffer, &ctx->draw_list);
|
|
}
|
|
#endif
|
|
|