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Improve performance of single-pixel blit.
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Redacted
2024-11-20 09:23:09 -05:00
parent ca7abb3044
commit f8395726cd
1 changed files with 8 additions and 5 deletions
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13
src/types/RenderTarget.cpp
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@@ -331,12 +331,14 @@ void JGL::RenderTarget::Blit(const JGL::RenderTarget& source, JGL::RenderTarget*
glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
}
// To avoid repeatedly allocating and deallocating.
JGL::RenderTarget* pixel = nullptr;
void JGL::RenderTarget::Blit(const Color4& color, const Vector2& position, JGL::RenderTarget* destination) {
if (position.x > destination->size.x || position.y > destination->size.y)
Logger::Warning("Blitting outside of the renderable area of the destination.");
Texture texture(Vector2(1,1));
RenderTarget source(&texture,color);
if (pixel == nullptr)
pixel = new RenderTarget({1,1});
GLint current_draw_fbo = 0;
GLint current_read_fbo = 0;
@@ -348,13 +350,14 @@ void JGL::RenderTarget::Blit(const Color4& color, const Vector2& position, JGL::
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &current_read_fbo);
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &current_draw_fbo);
SetActiveGLRenderTarget(source);
SetActiveGLRenderTarget(*pixel);
glClearColor(color.RedChannelNormalized(), color.GreenChannelNormalized(), color.BlueChannelNormalized(), color.AlphaChannelNormalized());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClear(GL_COLOR_BUFFER_BIT);
// Invert so it's relative to the top left corner.
int target_y = destination->size.y - position.y - 1;
glBindFramebuffer(GL_READ_FRAMEBUFFER, source.framebuffer_object);
glBindFramebuffer(GL_READ_FRAMEBUFFER, pixel->framebuffer_object);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, destination->framebuffer_object);
glBlitFramebuffer(0, 0, 1, 1, position.x, target_y, position.x + 1, target_y + 1, GL_COLOR_BUFFER_BIT, GL_NEAREST);