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/*
* 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.
*
* Copyright 2020, Blender Foundation.
*/
/** \file
* \ingroup draw
*/
#include <stdio.h>
#include "draw_manager.h"
#include "DRW_render.h"
#include "GPU_batch.h"
#include "GPU_framebuffer.h"
#include "GPU_matrix.h"
#include "GPU_texture.h"
#include "DNA_space_types.h"
#include "BKE_colortools.h"
#include "IMB_colormanagement.h"
#include "draw_color_management.h"
/* -------------------------------------------------------------------- */
/** \name Color Management
* \{ */
void DRW_viewport_colormanagement_set(GPUViewport *viewport, DRWContextState *draw_ctx)
{
const Scene *scene = draw_ctx->scene;
const View3D *v3d = draw_ctx->v3d;
const ColorManagedDisplaySettings *display_settings = &scene->display_settings;
ColorManagedViewSettings view_settings;
float dither = 0.0f;
bool use_render_settings = false;
bool use_view_transform = false;
if (v3d) {
bool use_workbench = BKE_scene_uses_blender_workbench(scene);
bool use_scene_lights = (!v3d ||
((v3d->shading.type == OB_MATERIAL) &&
(v3d->shading.flag & V3D_SHADING_SCENE_LIGHTS)) ||
((v3d->shading.type == OB_RENDER) &&
(v3d->shading.flag & V3D_SHADING_SCENE_LIGHTS_RENDER)));
bool use_scene_world = (!v3d ||
((v3d->shading.type == OB_MATERIAL) &&
(v3d->shading.flag & V3D_SHADING_SCENE_WORLD)) ||
((v3d->shading.type == OB_RENDER) &&
(v3d->shading.flag & V3D_SHADING_SCENE_WORLD_RENDER)));
use_view_transform = v3d && (v3d->shading.type >= OB_MATERIAL);
use_render_settings = v3d && ((use_workbench && use_view_transform) || use_scene_lights ||
use_scene_world);
}
else if (DST.draw_ctx.space_data && DST.draw_ctx.space_data->spacetype == SPACE_IMAGE) {
SpaceImage *sima = (SpaceImage *)DST.draw_ctx.space_data;
Image *image = sima->image;
/* Use inverse logic as there isn't a setting for `Color And Alpha`. */
const eSpaceImage_Flag display_channels_mode = static_cast<eSpaceImage_Flag>(sima->flag);
const bool display_color_channel = (display_channels_mode & (SI_SHOW_ALPHA | SI_SHOW_ZBUF)) ==
0;
if (display_color_channel && image && (image->source != IMA_SRC_GENERATED) &&
((image->flag & IMA_VIEW_AS_RENDER) != 0)) {
use_render_settings = true;
}
}
else if (DST.draw_ctx.space_data && DST.draw_ctx.space_data->spacetype == SPACE_NODE) {
SpaceNode *snode = (SpaceNode *)DST.draw_ctx.space_data;
const eSpaceNode_Flag display_channels_mode = static_cast<eSpaceNode_Flag>(snode->flag);
const bool display_color_channel = (display_channels_mode & SNODE_SHOW_ALPHA) == 0;
if (display_color_channel) {
use_render_settings = true;
}
}
else {
use_render_settings = true;
use_view_transform = false;
}
if (use_render_settings) {
/* Use full render settings, for renders with scene lighting. */
view_settings = scene->view_settings;
dither = scene->r.dither_intensity;
}
else if (use_view_transform) {
/* Use only view transform + look and nothing else for lookdev without
* scene lighting, as exposure depends on scene light intensity. */
BKE_color_managed_view_settings_init_render(&view_settings, display_settings, NULL);
STRNCPY(view_settings.view_transform, scene->view_settings.view_transform);
STRNCPY(view_settings.look, scene->view_settings.look);
dither = scene->r.dither_intensity;
}
else {
/* For workbench use only default view transform in configuration,
* using no scene settings. */
BKE_color_managed_view_settings_init_render(&view_settings, display_settings, NULL);
}
GPU_viewport_colorspace_set(viewport, &view_settings, display_settings, dither);
}
/* Draw texture to framebuffer without any color transforms */
void DRW_transform_none(GPUTexture *tex)
{
drw_state_set(DRW_STATE_WRITE_COLOR);
GPU_matrix_identity_set();
GPU_matrix_identity_projection_set();
/* Draw as texture for final render (without immediate mode). */
GPUBatch *geom = DRW_cache_fullscreen_quad_get();
GPU_batch_program_set_builtin(geom, GPU_SHADER_2D_IMAGE_COLOR);
GPU_batch_uniform_4f(geom, "color", 1.0f, 1.0f, 1.0f, 1.0f);
GPU_batch_texture_bind(geom, "image", tex);
GPU_batch_draw(geom);
GPU_texture_unbind(tex);
}
/** \} */
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