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/*
* Copyright 2016, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor(s): Blender Institute
*
*/
/** \file blender/draw/intern/draw_manager_framebuffer.c
* \ingroup draw
*/
#include "draw_manager.h"
GPUFrameBuffer *DRW_framebuffer_create(void)
{
return GPU_framebuffer_create();
}
void DRW_framebuffer_init(
GPUFrameBuffer **fb, void *engine_type, int width, int height,
DRWFboTexture textures[MAX_FBO_TEX], int textures_len)
{
BLI_assert(textures_len <= MAX_FBO_TEX);
BLI_assert(width > 0 && height > 0);
bool create_fb = false;
int color_attachment = -1;
if (!*fb) {
*fb = GPU_framebuffer_create();
create_fb = true;
}
for (int i = 0; i < textures_len; ++i) {
int channels;
bool is_depth;
bool create_tex = false;
GPUTextureFormat gpu_format;
DRWFboTexture fbotex = textures[i];
bool is_temp = (fbotex.flag & DRW_TEX_TEMP) != 0;
drw_texture_get_format(fbotex.format, true, &gpu_format, &channels, &is_depth);
if (!*fbotex.tex || is_temp) {
/* Temp textures need to be queried each frame, others not. */
if (is_temp) {
*fbotex.tex = GPU_viewport_texture_pool_query(
DST.viewport, engine_type, width, height, channels, gpu_format);
}
else {
*fbotex.tex = GPU_texture_create_2D_custom(
width, height, channels, gpu_format, NULL, NULL);
create_tex = true;
}
}
if (!is_depth) {
++color_attachment;
}
if (create_fb || create_tex) {
drw_texture_set_parameters(*fbotex.tex, fbotex.flag);
GPU_framebuffer_texture_attach(*fb, *fbotex.tex, color_attachment, 0);
}
}
if (create_fb && (textures_len > 0)) {
if (!GPU_framebuffer_check_valid(*fb, NULL)) {
printf("Error invalid framebuffer\n");
}
/* Detach temp textures */
for (int i = 0; i < textures_len; ++i) {
DRWFboTexture fbotex = textures[i];
if ((fbotex.flag & DRW_TEX_TEMP) != 0) {
GPU_framebuffer_texture_detach(*fbotex.tex);
}
}
if (DST.default_framebuffer != NULL) {
GPU_framebuffer_bind(DST.default_framebuffer);
}
}
}
void DRW_framebuffer_free(GPUFrameBuffer *fb)
{
GPU_framebuffer_free(fb);
}
void DRW_framebuffer_bind(GPUFrameBuffer *fb)
{
GPU_framebuffer_bind(fb);
}
void DRW_framebuffer_clear(bool color, bool depth, bool stencil, float clear_col[4], float clear_depth)
{
if (color) {
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glClearColor(clear_col[0], clear_col[1], clear_col[2], clear_col[3]);
}
if (depth) {
glDepthMask(GL_TRUE);
glClearDepth(clear_depth);
}
if (stencil) {
glStencilMask(0xFF);
}
glClear(((color) ? GL_COLOR_BUFFER_BIT : 0) |
((depth) ? GL_DEPTH_BUFFER_BIT : 0) |
((stencil) ? GL_STENCIL_BUFFER_BIT : 0));
}
void DRW_framebuffer_read_data(int x, int y, int w, int h, int channels, int slot, float *data)
{
GLenum type;
switch (channels) {
case 1: type = GL_RED; break;
case 2: type = GL_RG; break;
case 3: type = GL_RGB; break;
case 4: type = GL_RGBA; break;
default:
BLI_assert(false && "wrong number of read channels");
return;
}
glReadBuffer(GL_COLOR_ATTACHMENT0 + slot);
glReadPixels(x, y, w, h, type, GL_FLOAT, data);
}
void DRW_framebuffer_read_depth(int x, int y, int w, int h, float *data)
{
GLenum type = GL_DEPTH_COMPONENT;
glReadBuffer(GL_COLOR_ATTACHMENT0); /* This is OK! */
glReadPixels(x, y, w, h, type, GL_FLOAT, data);
}
void DRW_framebuffer_texture_attach(GPUFrameBuffer *fb, GPUTexture *tex, int slot, int mip)
{
GPU_framebuffer_texture_attach(fb, tex, slot, mip);
}
void DRW_framebuffer_texture_layer_attach(GPUFrameBuffer *fb, GPUTexture *tex, int slot, int layer, int mip)
{
GPU_framebuffer_texture_layer_attach(fb, tex, slot, layer, mip);
}
void DRW_framebuffer_cubeface_attach(GPUFrameBuffer *fb, GPUTexture *tex, int slot, int face, int mip)
{
GPU_framebuffer_texture_cubeface_attach(fb, tex, slot, face, mip);
}
void DRW_framebuffer_texture_detach(GPUTexture *tex)
{
GPU_framebuffer_texture_detach(tex);
}
void DRW_framebuffer_blit(GPUFrameBuffer *fb_read, GPUFrameBuffer *fb_write, bool depth, bool stencil)
{
GPU_framebuffer_blit(fb_read, 0, fb_write, 0, depth, stencil);
}
void DRW_framebuffer_recursive_downsample(
GPUFrameBuffer *fb, GPUTexture *tex, int num_iter,
void (*callback)(void *userData, int level), void *userData)
{
GPU_framebuffer_recursive_downsample(fb, tex, num_iter, callback, userData);
}
void DRW_framebuffer_viewport_size(GPUFrameBuffer *UNUSED(fb_read), int x, int y, int w, int h)
{
glViewport(x, y, w, h);
}
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