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Review rlReadTexturePixels()

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Improve second option to retrieve texture data from fbo...

Still requires some testing...
This commit is contained in:
Ray San 2017-10-25 12:46:26 +02:00
parent 31c8c86d8e
commit ab01cd45bc
1 changed files with 17 additions and 19 deletions
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36
src/rlgl.c
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@ -2222,32 +2222,30 @@ void *rlReadTexturePixels(Texture2D texture)
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, width, height);
//glMatrixMode(GL_PROJECTION);
//glLoadIdentity();
rlOrtho(0.0, width, height, 0.0, 0.0, 1.0);
//glMatrixMode(GL_MODELVIEW);
//glLoadIdentity();
//glDisable(GL_TEXTURE_2D);
//glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
//glDisable(GL_BLEND);
glViewport(0, 0, width, height);
rlOrtho(0.0, width, height, 0.0, 0.0, 1.0);
Model quad;
//quad.mesh = GenMeshQuad(width, height);
quad.transform = MatrixIdentity();
quad.shader = defaultShader;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(GetShaderDefault().id);
glBindTexture(GL_TEXTURE_2D, texture.id);
GenDrawQuad();
glBindTexture(GL_TEXTURE_2D, 0);
glUseProgram(0);
pixels = (unsigned char *)malloc(texture.width*texture.height*4*sizeof(unsigned char));
DrawModel(quad, (Vector3){ 0.0f, 0.0f, 0.0f }, 1.0f, WHITE);
pixels = (unsigned char *)malloc(texture.width*texture.height*3*sizeof(unsigned char));
glReadPixels(0, 0, texture.width, texture.height, GL_RGB, GL_UNSIGNED_BYTE, pixels);
glReadPixels(0, 0, texture.width, texture.height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
// Bind framebuffer 0, which means render to back buffer
glBindFramebuffer(GL_FRAMEBUFFER, 0);
UnloadModel(quad);
// Reset viewport dimensions to default
glViewport(0, 0, screenWidth, screenHeight);
#endif // GET_TEXTURE_FBO_OPTION
// Clean up temporal fbo