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render/gles2: disable blending opportunistically 

We don't always need to enable blending: when the texture doesn't
have alpha or when the color is opaque, we can disable it.
This commit is contained in:
Simon Ser 2021-07-11 19:44:57 +02:00 committed by Simon Zeni
parent 9dba176e8d
commit 5544973814
1 changed files with 13 additions and 2 deletions
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15
render/gles2/renderer.c
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@ -204,8 +204,6 @@ static void gles2_begin(struct wlr_renderer *wlr_renderer, uint32_t width,
wlr_matrix_projection(renderer->projection, width, height, wlr_matrix_projection(renderer->projection, width, height,
WL_OUTPUT_TRANSFORM_NORMAL); WL_OUTPUT_TRANSFORM_NORMAL);
// enable transparency
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
// XXX: maybe we should save output projection and remove some of the need // XXX: maybe we should save output projection and remove some of the need
@ -294,6 +292,12 @@ static bool gles2_render_subtexture_with_matrix(
push_gles2_debug(renderer); push_gles2_debug(renderer);
if (!texture->has_alpha && alpha == 1.0) {
glDisable(GL_BLEND);
} else {
glEnable(GL_BLEND);
}
glActiveTexture(GL_TEXTURE0); glActiveTexture(GL_TEXTURE0);
glBindTexture(texture->target, texture->tex); glBindTexture(texture->target, texture->tex);
@ -348,6 +352,13 @@ static void gles2_render_quad_with_matrix(struct wlr_renderer *wlr_renderer,
wlr_matrix_transpose(gl_matrix, gl_matrix); wlr_matrix_transpose(gl_matrix, gl_matrix);
push_gles2_debug(renderer); push_gles2_debug(renderer);
if (color[3] == 1.0) {
glDisable(GL_BLEND);
} else {
glEnable(GL_BLEND);
}
glUseProgram(renderer->shaders.quad.program); glUseProgram(renderer->shaders.quad.program);
glUniformMatrix3fv(renderer->shaders.quad.proj, 1, GL_FALSE, gl_matrix); glUniformMatrix3fv(renderer->shaders.quad.proj, 1, GL_FALSE, gl_matrix);