prosperon/source/engine/openglrender.c

#include "openglrender.h"

#include "sprite.h"
#include "shader.h"
#include "font.h"
#include "config.h"
#include "static_actor.h"
#include "gameobject.h"
#include "camera.h"
#include "window.h"
#include "debugdraw.h"
#include "log.h"
#include "datastream.h"

int renderMode = 0;

static GLuint UBO;

struct shader *spriteShader = NULL;
struct shader *animSpriteShader = NULL;
static struct shader *textShader;

mfloat_t editorClearColor[4] = { 0.2f, 0.4f, 0.3f, 1.f };

float shadowLookahead = 8.5f;

mfloat_t gridSmallColor[3] = { 0.35f, 1.f, 0.9f };

mfloat_t gridBigColor[3] = { 0.92f, 0.92f, 0.68f };

float gridScale = 500.f;
float smallGridUnit = 1.f;
float bigGridUnit = 10.f;
float gridSmallThickness = 2.f;
float gridBigThickness = 7.f;
float gridOpacity = 0.3f;

mfloat_t proj[16];

// Debug render modes
bool renderGizmos = false;
bool showGrid = true;
bool debugDrawPhysics = false;
bool renderNav = false;

// Lighting effect flags
bool renderAO = true;
bool renderDynamicShadows = true;
bool renderRefraction = true;
bool renderReflection = true;

///// for editing
struct gameobject *selectedobject = NULL;
char objectName[200] = { '\0' };	// object name buffer

GLuint debugColorPickBO = 0;
GLuint debugColorPickTEX = 0;


struct sprite *tsprite = NULL;


static unsigned int projUBO;

void openglInit()
{
    if (!mainwin) {
        YughError("No window to init OpenGL on.", 1);
        exit(1);
    }

    ////// MAKE SHADERS
    spriteShader = MakeShader("spritevert.glsl", "spritefrag.glsl");
    animSpriteShader = MakeShader("animspritevert.glsl", "animspritefrag.glsl");
    textShader = MakeShader("textvert.glsl", "textfrag.glsl");



    shader_use(textShader);
    shader_setint(textShader, "text", 0);



    font_init(textShader);
    sprite_initialize();
    debugdraw_init();

    glClearColor(editorClearColor[0], editorClearColor[1], editorClearColor[2], editorClearColor[3]);

    glEnable(GL_CULL_FACE);
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    glGenBuffers(1, &projUBO);
    glBindBuffer(GL_UNIFORM_BUFFER, projUBO);
    glBufferData(GL_UNIFORM_BUFFER, 64, NULL, GL_DYNAMIC_DRAW);
    glBindBufferRange(GL_UNIFORM_BUFFER, 0, projUBO, 0, sizeof(float) * 16);
    glBindBuffer(GL_UNIFORM_BUFFER, 0);

    shader_setUBO(spriteShader, "Projection", 0);
    shader_setUBO(textShader, "Projection", 0);
    shader_setUBO(animSpriteShader, "Projection", 0);
}


static struct mCamera mcamera = {0};
void openglRender(struct window *window)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glClearColor(0.3f, 0.3f, 0.3f, 1.f);


    //////////// 2D projection
    mfloat_t projection[16] = { 0.f };
    mat4_ortho(projection, mcamera.transform.position[0],
	       window->width + mcamera.transform.position[0],
	       mcamera.transform.position[1],
	       window->height + mcamera.transform.position[1], -1.f, 1.f);
    glBindBuffer(GL_UNIFORM_BUFFER, projUBO);
    glBufferSubData(GL_UNIFORM_BUFFER, 0, 64, projection);

    //shader_setmat4(vid_shader, "projection", projection);
   glEnable(GL_DEPTH_TEST);

    // Clear color and depth
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    ////// TEXT && GUI
    //script_call_sym(window->gui_cb);

    ///// Sprites
    glDepthFunc(GL_LESS);
    shader_use(spriteShader);
    sprite_draw_all();

     glDepthFunc(GL_ALWAYS);
     shader_use(textShader);
     shader_setmat4(textShader, "projection", projection);

}

void BindUniformBlock(GLuint shaderID, const char *bufferName, GLuint bufferBind)
{
    glUniformBlockBinding(shaderID, glGetUniformBlockIndex(shaderID, bufferName), bufferBind);
}