shithub: cstory

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OpenGL: Only enable blending for glyphs

Should improve performance

--- a/src/Backends/Rendering/OpenGL3.cpp

+++ b/src/Backends/Rendering/OpenGL3.cpp

@@ -199,7 +199,6 @@

 	glEnable(GL_DEBUG_OUTPUT);

 	glDebugMessageCallback(MessageCallback, 0);

-	glEnable(GL_BLEND);

 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

 	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

@@ -269,6 +268,8 @@

 {

 	glUseProgram(program_texture);

+	glDisable(GL_BLEND);

+

 	// Enable texture coordinates, since this uses textures

 	glEnableVertexAttribArray(2);

@@ -377,6 +378,8 @@

 	// Switch to colour-key shader if we have to

 	glUseProgram(colour_key ? program_texture_colour_key : program_texture);

+	glDisable(GL_BLEND);

+

 	// Enable texture coordinates, since this uses textures

 	glEnableVertexAttribArray(2);

@@ -438,6 +441,8 @@

 	glUseProgram(program_colour_fill);

+	glDisable(GL_BLEND);

+

 	// Disable texture coordinate array, since this doesn't use textures

 	glDisableVertexAttribArray(2);

@@ -567,6 +572,8 @@

 	glViewport(0, 0, surface->width, surface->height);

 	glUseProgram(program_glyph);

+

+	glEnable(GL_BLEND);

 	// Enable texture coordinates, since this uses textures

 	glEnableVertexAttribArray(2);