int GPU_framebuffer_texture_attach(GPUFrameBuffer *fb, GPUTexture *tex, int slot, char err_out[256])
{
GLenum status;
GLenum attachment;
GLenum error;
if (slot >= GPU_FB_MAX_SLOTS) {
fprintf(stderr, "Attaching to index %d framebuffer slot unsupported in blender use at most %d\n", slot, GPU_FB_MAX_SLOTS);
return 0;
}
if (tex->number != -1) {
fprintf(stderr, "Feedback loop warning!: Attempting to attach texture to framebuffer while still bound to texture unit for drawing!");
}
if (tex->depth)
attachment = GL_DEPTH_ATTACHMENT_EXT;
else
attachment = GL_COLOR_ATTACHMENT0_EXT + slot;
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb->object);
GG.currentfb = fb->object;
/* Clean glError buffer. */
while (glGetError() != GL_NO_ERROR) {}
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment,
tex->target, tex->bindcode, 0);
error = glGetError();
if (error == GL_INVALID_OPERATION) {
GPU_framebuffer_restore();
GPU_print_framebuffer_error(error, err_out);
return 0;
}
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
GPU_framebuffer_restore();
GPU_print_framebuffer_error(status, err_out);
return 0;
}
if (tex->depth)
fb->depthtex = tex;
else
fb->colortex[slot] = tex;
tex->fb= fb;
tex->fb_attachment = slot;
return 1;
}
int GPU_framebuffer_texture_attach(GPUFrameBuffer *fb, GPUTexture *tex, char err_out[256])
{
GLenum status;
GLenum attachment;
GLenum error;
if (tex->depth)
attachment = GL_DEPTH_ATTACHMENT_EXT;
else
attachment = GL_COLOR_ATTACHMENT0_EXT;
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb->object);
GG.currentfb = fb->object;
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment,
tex->target, tex->bindcode, 0);
error = glGetError();
if (error == GL_INVALID_OPERATION) {
GPU_framebuffer_restore();
GPU_print_framebuffer_error(error, err_out);
return 0;
}
if (tex->depth) {
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
}
else {
glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
}
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
GPU_framebuffer_restore();
GPU_print_framebuffer_error(status, err_out);
return 0;
}
if (tex->depth)
fb->depthtex = tex;
else
fb->colortex = tex;
tex->fb= fb;
return 1;
}
