330 lines
7 KiB
C
330 lines
7 KiB
C
#include "texture.h"
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#include "log.h"
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#include "render.h"
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#include "sokol/sokol_gfx.h"
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#include <math.h>
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#include <stb_ds.h>
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#include <stb_image.h>
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#define STB_IMAGE_RESIZE_IMPLEMENTATION
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#include "stb_image_resize.h"
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#include <stdio.h>
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struct glrect ST_UNIT = {0.f, 1.f, 0.f, 1.f};
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static struct {
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char *key;
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struct Texture *value;
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} *texhash = NULL;
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struct Texture *tex_default;
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struct Texture *texture_notex() {
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return texture_pullfromfile("./icons/no_tex.png");
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}
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unsigned int next_pow2(unsigned int v)
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{
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v--;
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v |= v >> 1;
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v |= v >> 2;
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v |= v >> 4;
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v |= v >> 8;
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v |= v >> 16;
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v++;
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return v;
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}
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int mip_levels(int width, int height)
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{
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int levels = 0;
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while (width > 1 || height > 1)
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{
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width >>= 1;
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height >>= 1;
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levels++;
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}
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return levels;
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}
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int mip_wh(int w, int h, int *mw, int *mh, int lvl)
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{
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w >>= lvl;
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h >>= lvl;
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if (w == 0 && h == 0)
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return 1;
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*mw = w ? w : 1;
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*mh = h ? h : 1;
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return 0;
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}
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/* If an empty string or null is put for path, loads default texture */
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struct Texture *texture_pullfromfile(const char *path) {
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if (!path) return texture_notex();
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int index = shgeti(texhash, path);
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if (index != -1)
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return texhash[index].value;
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YughInfo("Loading texture %s.", path);
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struct Texture *tex = calloc(1, sizeof(*tex));
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tex->opts.sprite = 1;
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tex->opts.mips = 0;
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tex->opts.gamma = 0;
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tex->opts.wrapx = 1;
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tex->opts.wrapy = 1;
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int n;
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unsigned char *data = stbi_load(path, &tex->width, &tex->height, &n, 4);
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if (data == NULL) {
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YughError("STBI failed to load file %s with message: %s\nOpening default instead.", path, stbi_failure_reason());
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return texture_notex();
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}
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unsigned int nw = next_pow2(tex->width);
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unsigned int nh = next_pow2(tex->height);
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tex->data = data;
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int filter;
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if (tex->opts.sprite) {
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filter = SG_FILTER_NEAREST;
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} else {
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filter = SG_FILTER_LINEAR;
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}
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sg_image_data sg_img_data;
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int mips = mip_levels(tex->width, tex->height)+1;
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YughInfo("Has %d mip levels, from wxh %dx%d, pow2 is %ux%u.", mips, tex->width, tex->height,nw,nh);
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int mipw, miph;
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mipw = tex->width;
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miph = tex->height;
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sg_img_data.subimage[0][0] = (sg_range){ .ptr = data, .size = mipw*miph*4 };
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unsigned char *mipdata[mips];
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mipdata[0] = data;
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for (int i = 1; i < mips; i++) {
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int w, h, mipw, miph;
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mip_wh(tex->width, tex->height, &mipw, &miph, i-1); /* mipw miph are previous iteration */
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mip_wh(tex->width, tex->height, &w, &h, i);
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mipdata[i] = malloc(w * h * 4);
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stbir_resize_uint8(mipdata[i-1], mipw, miph, 0, mipdata[i], w, h, 0, 4);
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sg_img_data.subimage[0][i] = (sg_range){ .ptr = mipdata[i], .size = w*h*4 };
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mipw = w;
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miph = h;
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}
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tex->id = sg_make_image(&(sg_image_desc){
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.type = SG_IMAGETYPE_2D,
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.width = tex->width,
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.height = tex->height,
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.usage = SG_USAGE_IMMUTABLE,
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.min_filter = SG_FILTER_NEAREST_MIPMAP_NEAREST,
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.mag_filter = SG_FILTER_NEAREST,
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.num_mipmaps = mips,
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.wrap_u = SG_WRAP_REPEAT,
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.wrap_v = SG_WRAP_REPEAT,
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.data = sg_img_data
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});
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if (shlen(texhash) == 0)
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sh_new_arena(texhash);
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shput(texhash, path, tex);
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return tex;
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}
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void texture_sync(const char *path) {
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YughWarn("Need to implement texture sync.");
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}
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char *tex_get_path(struct Texture *tex) {
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for (int i = 0; i < shlen(texhash); i++) {
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if (tex == texhash[i].value) {
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YughInfo("Found key %s", texhash[i].key);
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return texhash[i].key;
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}
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}
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return "";
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}
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struct Texture *texture_loadfromfile(const char *path) {
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struct Texture *new = texture_pullfromfile(path);
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/*
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if (new->id == 0) {
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glGenTextures(1, &new->id);
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//tex_gpu_load(new);
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YughInfo("Loaded texture path %s", path);
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}
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*/
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return new;
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}
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void tex_gpu_reload(struct Texture *tex) {
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tex_gpu_free(tex);
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// tex_gpu_load(tex);
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}
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void anim_calc(struct anim2d *anim) {
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anim->size[0] = anim->anim->tex->width * st_s_w(anim->anim->st_frames[anim->frame]);
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anim->size[1] = anim->anim->tex->height * st_s_h(anim->anim->st_frames[anim->frame]);
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}
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void anim_incr(struct anim2d *anim) {
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anim->frame = (anim->frame + 1) % arrlen(anim->anim->st_frames);
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if (!anim->anim->loop && anim->frame == arrlen(anim->anim->st_frames))
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anim_pause(anim);
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anim_calc(anim);
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}
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void anim_decr(struct anim2d *anim) {
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anim->frame = (anim->frame + arrlen(anim->anim->st_frames) - 1) % arrlen(anim->anim->st_frames);
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anim_calc(anim);
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}
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struct glrect anim_get_rect(struct anim2d *anim) {
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return anim->anim->st_frames[anim->frame];
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}
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void anim_setframe(struct anim2d *anim, int frame) {
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anim->frame = frame;
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anim_calc(anim);
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}
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struct TexAnim *anim2d_from_tex(const char *path, int frames, int fps) {
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struct TexAnim *anim = malloc(sizeof(*anim));
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anim->tex = texture_loadfromfile(path);
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texanim_fromframes(anim, frames);
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anim->ms = (float)1 / fps;
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return anim;
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}
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void texanim_fromframes(struct TexAnim *anim, int frames) {
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if (anim->st_frames) {
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free(anim->st_frames);
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}
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arrsetlen(anim->st_frames, frames);
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float width = (float)1 / frames;
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for (int i = 0; i < frames; i++) {
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anim->st_frames[i].s0 = width * i;
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anim->st_frames[i].s1 = width * (i + 1);
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anim->st_frames[i].t0 = 0.f;
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anim->st_frames[i].t1 = 1.f;
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}
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}
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void tex_gpu_free(struct Texture *tex) {
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/*
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if (tex->id != 0) {
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glDeleteTextures(1, &tex->id);
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tex->id = 0;
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}
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*/
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}
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int anim_frames(struct TexAnim *a) {
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return arrlen(a->st_frames);
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}
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struct glrect tex_get_rect(struct Texture *tex) {
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return ST_UNIT;
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}
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cpVect tex_get_dimensions(struct Texture *tex) {
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if (!tex) return cpvzero;
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cpVect d;
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d.x = tex->width;
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d.y = tex->height;
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return d;
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}
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void tex_bind(struct Texture *tex) {
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/* glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, tex->id);
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glBindTexture(GL_TEXTURE_2D_ARRAY, tex->id);
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*/
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}
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/********************** ANIM2D ****************/
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void anim_load(struct anim2d *anim, const char *path) {
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anim->anim = &texture_pullfromfile(path)->anim;
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anim->anim->tex->opts.animation = 1;
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anim_stop(anim);
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anim_play(anim);
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}
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void anim_play(struct anim2d *anim) {
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if (anim->playing)
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return;
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if (anim->frame == anim_frames(anim->anim))
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anim->frame = 0;
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anim->playing = 1;
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if (anim->timer == NULL)
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anim->timer = id2timer(timer_make(1.f / anim->anim->ms, anim_incr, anim, 0));
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else
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timerr_settime(anim->timer, 1.f / anim->anim->ms);
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timer_start(anim->timer);
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}
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void anim_stop(struct anim2d *anim) {
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if (!anim->playing)
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return;
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anim->playing = 0;
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anim->frame = 0;
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anim->pausetime = 0;
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timer_stop(anim->timer);
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}
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void anim_pause(struct anim2d *anim) {
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if (!anim->playing)
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return;
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anim->playing = 0;
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timer_pause(anim->timer);
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}
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void anim_fwd(struct anim2d *anim) {
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anim_incr(anim);
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}
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void anim_bkwd(struct anim2d *anim) {
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anim_decr(anim);
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}
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float st_s_w(struct glrect st) {
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return (st.s1 - st.s0);
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}
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float st_s_h(struct glrect st) {
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return (st.t1 - st.t0);
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}
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