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Add support for contrast-adaptive sharpening in 3D (GLES3 only)

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This is an older, easier to implement variant of CAS as a pure
fragment shader. It doesn't support upscaling, but we won't make
use of it (at least for now).

The sharpening intensity can be adjusted on a per-Viewport basis.
For the root viewport, it can be adjusted in the Project Settings.

Since `textureLodOffset()` isn't available in GLES2, there is no
way to support contrast-adaptive sharpening in GLES2.
This commit is contained in:
Hugo Locurcio
2021-03-27 18:58:12 +01:00
parent 296608460b
commit a9c0c5484f
23 changed files with 159 additions and 6 deletions
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8
drivers/gles3/rasterizer_scene_gles3.cpp
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@@ -3503,7 +3503,7 @@ void RasterizerSceneGLES3::_post_process(Environment *env, const CameraMatrix &p
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
}
if ((!env || storage->frame.current_rt->flags[RasterizerStorage::RENDER_TARGET_TRANSPARENT] || storage->frame.current_rt->width < 4 || storage->frame.current_rt->height < 4) && !storage->frame.current_rt->use_fxaa && !storage->frame.current_rt->use_debanding) { //no post process on small render targets
if ((!env || storage->frame.current_rt->flags[RasterizerStorage::RENDER_TARGET_TRANSPARENT] || storage->frame.current_rt->width < 4 || storage->frame.current_rt->height < 4) && !storage->frame.current_rt->use_fxaa && !storage->frame.current_rt->use_debanding && storage->frame.current_rt->sharpen_intensity < 0.001) { //no post process on small render targets
//no environment or transparent render, simply return and convert to SRGB
if (storage->frame.current_rt->external.fbo != 0) {
glBindFramebuffer(GL_FRAMEBUFFER, storage->frame.current_rt->external.fbo);
@@ -3862,6 +3862,7 @@ void RasterizerSceneGLES3::_post_process(Environment *env, const CameraMatrix &p
state.tonemap_shader.set_conditional(TonemapShaderGLES3::KEEP_3D_LINEAR, storage->frame.current_rt->flags[RasterizerStorage::RENDER_TARGET_KEEP_3D_LINEAR]);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_FXAA, storage->frame.current_rt->use_fxaa);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_DEBANDING, storage->frame.current_rt->use_debanding);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_SHARPENING, storage->frame.current_rt->sharpen_intensity >= 0.001);
if (env && max_glow_level >= 0) {
for (int i = 0; i < (max_glow_level + 1); i++) {
@@ -3941,11 +3942,16 @@ void RasterizerSceneGLES3::_post_process(Environment *env, const CameraMatrix &p
state.tonemap_shader.set_uniform(TonemapShaderGLES3::PIXEL_SIZE, Vector2(1.0 / storage->frame.current_rt->width, 1.0 / storage->frame.current_rt->height));
}
if (storage->frame.current_rt->sharpen_intensity >= 0.001) {
state.tonemap_shader.set_uniform(TonemapShaderGLES3::SHARPEN_INTENSITY, storage->frame.current_rt->sharpen_intensity);
}
_copy_screen(true, true);
//turn off everything used
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_FXAA, false);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_DEBANDING, false);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_SHARPENING, false);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_AUTO_EXPOSURE, false);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_FILMIC_TONEMAPPER, false);
state.tonemap_shader.set_conditional(TonemapShaderGLES3::USE_ACES_TONEMAPPER, false);