Replaced renderer calls to glReadPixels(reads the framebuffer) with calls to glGetTexImage(reads a texture). Updates to sprites will read the contents of the decal back instead of reading the framebuffer.

Gusgo99 · Gusgo99 · commit b650cbe69cd1 · 2024-10-21T22:00:42.000-03:00
diff --git a/olcPixelGameEngine.h b/olcPixelGameEngine.h
@@ -5042,7 +5042,7 @@ namespace olc
 
 		void ReadTexture(uint32_t id, olc::Sprite* spr) override
 		{
-			glReadPixels(0, 0, spr->width, spr->height, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());
+			glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());
 		}
 
 		void ApplyTexture(uint32_t id) override
@@ -5582,7 +5582,7 @@ namespace olc
 
 		void ReadTexture(uint32_t id, olc::Sprite* spr) override
 		{
-			glReadPixels(0, 0, spr->width, spr->height, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());
+			glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());
 		}
 
 		void ApplyTexture(uint32_t id) override

Original file line number	Diff line number	Diff line change
`@@ -5042,7 +5042,7 @@ namespace olc`
`5042`	`5042`
`5043`	`5043`	`void ReadTexture(uint32_t id, olc::Sprite* spr) override`
`5044`	`5044`	`{`
`5045`		`- glReadPixels(0, 0, spr->width, spr->height, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());`
	`5045`	`+ glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());`
`5046`	`5046`	`}`
`5047`	`5047`
`5048`	`5048`	`void ApplyTexture(uint32_t id) override`
`@@ -5582,7 +5582,7 @@ namespace olc`
`5582`	`5582`
`5583`	`5583`	`void ReadTexture(uint32_t id, olc::Sprite* spr) override`
`5584`	`5584`	`{`
`5585`		`- glReadPixels(0, 0, spr->width, spr->height, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());`
	`5585`	`+ glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, spr->GetData());`
`5586`	`5586`	`}`
`5587`	`5587`
`5588`	`5588`	`void ApplyTexture(uint32_t id) override`