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Added SDL_GL_ExtensionSupported()

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Use GL_ARB_texture_rectangle in the OpenGL renderer, if supported.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401971
This commit is contained in:
Sam Lantinga 2006-07-22 21:58:17 +00:00
parent f4ac9ed70c
commit c05ca3687f
4 changed files with 96 additions and 28 deletions
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42
src/video/SDL_renderer_gl.c
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@ -97,6 +97,7 @@ SDL_RenderDriver GL_RenderDriver = {
typedef struct
{
SDL_GLContext context;
SDL_bool GL_ARB_texture_rectangle_supported;
} GL_RenderData;
typedef struct
@ -226,16 +227,19 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &renderer->info.max_texture_width);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &renderer->info.max_texture_height);
/* FIXME: Check for GL_ARB_texture_rectangle and GL_EXT_texture_rectangle */
if (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle")
|| SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle")) {
data->GL_ARB_texture_rectangle_supported = SDL_TRUE;
}
/* Set up parameters for rendering */
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
#ifdef USE_GL_TEXTURE_RECTANGLE
glEnable(GL_TEXTURE_RECTANGLE_ARB);
#else
glEnable(GL_TEXTURE_2D);
#endif
if (data->GL_ARB_texture_rectangle_supported) {
glEnable(GL_TEXTURE_RECTANGLE_ARB);
} else {
glEnable(GL_TEXTURE_2D);
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
@ -369,19 +373,19 @@ GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
glGetError();
glGenTextures(1, &data->texture);
#ifdef USE_GL_TEXTURE_RECTANGLE
data->type = GL_TEXTURE_RECTANGLE_ARB;
texture_w = texture->w;
texture_h = texture->h;
data->texw = (GLfloat) texture->w;
data->texh = (GLfloat) texture->h;
#else
data->type = GL_TEXTURE_2D;
texture_w = power_of_2(texture->w);
texture_h = power_of_2(texture->h);
data->texw = (GLfloat) texture->w / texture_w;
data->texh = (GLfloat) texture->h / texture_h;
#endif
if (renderdata->GL_ARB_texture_rectangle_supported) {
data->type = GL_TEXTURE_RECTANGLE_ARB;
texture_w = texture->w;
texture_h = texture->h;
data->texw = (GLfloat) texture->w;
data->texh = (GLfloat) texture->h;
} else {
data->type = GL_TEXTURE_2D;
texture_w = power_of_2(texture->w);
texture_h = power_of_2(texture->h);
data->texw = (GLfloat) texture->w / texture_w;
data->texh = (GLfloat) texture->h / texture_h;
}
data->format = format;
data->formattype = type;
glBindTexture(data->type, data->texture);