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Only copy the relevant portion of the screen when copying to backbuffer in Compatibility backend 

(cherry picked from commit e69968b794)
This commit is contained in:
clayjohn 2023-11-11 00:17:26 +01:00 committed by Yuri Sizov
parent ed06389a34
commit 52b3d2915a
4 changed files with 20 additions and 3 deletions
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12
drivers/gles3/effects/copy_effects.cpp
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@ -125,6 +125,18 @@ void CopyEffects::copy_to_rect(const Rect2 &p_rect) {
draw_screen_quad();
}
void CopyEffects::copy_to_and_from_rect(const Rect2 &p_rect) {
bool success = copy.shader.version_bind_shader(copy.shader_version, CopyShaderGLES3::MODE_COPY_SECTION_SOURCE);
if (!success) {
return;
}
copy.shader.version_set_uniform(CopyShaderGLES3::COPY_SECTION, p_rect.position.x, p_rect.position.y, p_rect.size.x, p_rect.size.y, copy.shader_version, CopyShaderGLES3::MODE_COPY_SECTION_SOURCE);
copy.shader.version_set_uniform(CopyShaderGLES3::SOURCE_SECTION, p_rect.position.x, p_rect.position.y, p_rect.size.x, p_rect.size.y, copy.shader_version, CopyShaderGLES3::MODE_COPY_SECTION_SOURCE);
draw_screen_quad();
}
void CopyEffects::copy_screen() {
bool success = copy.shader.version_bind_shader(copy.shader_version, CopyShaderGLES3::MODE_DEFAULT);
if (!success) {

1
drivers/gles3/effects/copy_effects.h
View File

@ -62,6 +62,7 @@ public:
// These functions assume that a framebuffer and texture are bound already. They only manage the shader, uniforms, and vertex array.
void copy_to_rect(const Rect2 &p_rect);
void copy_to_and_from_rect(const Rect2 &p_rect);
void copy_screen();
void copy_cube_to_rect(const Rect2 &p_rect);
void bilinear_blur(GLuint p_source_texture, int p_mipmap_count, const Rect2i &p_region);

5
drivers/gles3/shaders/copy.glsl
View File

@ -3,6 +3,7 @@
mode_default = #define MODE_SIMPLE_COPY
mode_copy_section = #define USE_COPY_SECTION \n#define MODE_SIMPLE_COPY
mode_copy_section_source = #define USE_COPY_SECTION \n#define MODE_SIMPLE_COPY \n#define MODE_COPY_FROM
mode_gaussian_blur = #define MODE_GAUSSIAN_BLUR
mode_mipmap = #define MODE_MIPMAP
mode_simple_color = #define MODE_SIMPLE_COLOR \n#define USE_COPY_SECTION
@ -21,7 +22,7 @@ out vec2 uv_interp;
// Defined in 0-1 coords.
uniform highp vec4 copy_section;
#endif
#ifdef MODE_GAUSSIAN_BLUR
#if defined(MODE_GAUSSIAN_BLUR) || defined(MODE_COPY_FROM)
uniform highp vec4 source_section;
#endif
@ -32,7 +33,7 @@ void main() {
#if defined(USE_COPY_SECTION) || defined(MODE_GAUSSIAN_BLUR)
gl_Position.xy = (copy_section.xy + uv_interp.xy * copy_section.zw) * 2.0 - 1.0;
#endif
#ifdef MODE_GAUSSIAN_BLUR
#if defined(MODE_GAUSSIAN_BLUR) || defined(MODE_COPY_FROM)
uv_interp = source_section.xy + uv_interp * source_section.zw;
#endif
}

5
drivers/gles3/storage/texture_storage.cpp
View File

@ -2597,7 +2597,10 @@ void TextureStorage::render_target_copy_to_back_buffer(RID p_render_target, cons
glBindFramebuffer(GL_FRAMEBUFFER, rt->backbuffer_fbo);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, rt->color);
GLES3::CopyEffects::get_singleton()->copy_screen();
Rect2 normalized_region = region;
normalized_region.position = normalized_region.position / Size2(rt->size);
normalized_region.size = normalized_region.size / Size2(rt->size);
GLES3::CopyEffects::get_singleton()->copy_to_and_from_rect(normalized_region);
if (p_gen_mipmaps) {
GLES3::CopyEffects::get_singleton()->gaussian_blur(rt->backbuffer, rt->mipmap_count, region, rt->size);