void R_InitFBObjects (void)
{
unsigned int filters[2];
float scales[DOWNSAMPLE_PASSES];
int i;
if (!r_config.frameBufferObject || !r_programs->integer)
return;
frameBufferObjectCount = 0;
OBJZERO(frameBufferObjects);
OBJZERO(frameBufferTextures);
r_state.frameBufferObjectsInitialized = true;
for (i = 0; i < DOWNSAMPLE_PASSES; i++)
scales[i] = powf(DOWNSAMPLE_SCALE, i + 1);
/* setup default screen framebuffer */
screenBuffer.fbo = 0;
screenBuffer.depth = 0;
screenBuffer.nTextures = 0;
screenBuffer.width = viddef.context.width;
screenBuffer.height = viddef.context.height;
R_SetupViewport(&screenBuffer, 0, 0, viddef.context.width, viddef.context.height);
Vector4Clear(screenBuffer.clearColor);
/* use default framebuffer */
qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
r_state.activeFramebuffer = &screenBuffer;
colorAttachments = Mem_AllocTypeN(GLenum, r_config.maxDrawBuffers);
for (i = 0; i < r_config.maxDrawBuffers; i++)
colorAttachments[i] = GL_COLOR_ATTACHMENT0_EXT + i;
filters[0] = GL_NEAREST;
filters[1] = GL_LINEAR_MIPMAP_LINEAR;
/* setup main 3D render target */
r_state.renderBuffer = R_CreateFramebuffer(viddef.context.width, viddef.context.height, 2, true, false, filters);
/* setup bloom render targets */
fbo_bloom0 = R_CreateFramebuffer(viddef.context.width, viddef.context.height, 1, false, false, filters);
fbo_bloom1 = R_CreateFramebuffer(viddef.context.width, viddef.context.height, 1, false, false, filters);
filters[0] = GL_LINEAR;
/* setup extra framebuffers */
for (i = 0; i < DOWNSAMPLE_PASSES; i++) {
const int h = (int)((float)viddef.context.height / scales[i]);
const int w = (int)((float)viddef.context.width / scales[i]);
r_state.buffers0[i] = R_CreateFramebuffer(w, h, 1, false, false, filters);
r_state.buffers1[i] = R_CreateFramebuffer(w, h, 1, false, false, filters);
r_state.buffers2[i] = R_CreateFramebuffer(w, h, 1, false, false, filters);
R_CheckError();
}
}
/**
* @brief Allocate handles for the stainmap
*/
static void R_AllocStainmap_(const uint32_t width, const uint32_t height, r_stainmap_t *out) {
out->image = R_AllocLightmap_(IT_STAINMAP, width, height);
R_UploadImage(out->image, GL_RGBA, NULL);
out->fb = R_CreateFramebuffer(va("%s_fb", out->image->media.name));
R_AttachFramebufferImage(out->fb, out->image);
if (!R_FramebufferReady(out->fb)) {
Com_Warn("Unable to allocate a stainmap framebuffer");
memset(out, 0, sizeof(r_stainmap_t));
}
Matrix4x4_FromOrtho(&out->projection, 0.0, width, height, 0.0, -1.0, 1.0);
R_BindFramebuffer(FRAMEBUFFER_DEFAULT);
}
