diff options
Diffstat (limited to 'cogl/cogl-pipeline-vertend-glsl.c')
| -rw-r--r-- | cogl/cogl-pipeline-vertend-glsl.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/cogl/cogl-pipeline-vertend-glsl.c b/cogl/cogl-pipeline-vertend-glsl.c index 602cf02c..c1167283 100644 --- a/cogl/cogl-pipeline-vertend-glsl.c +++ b/cogl/cogl-pipeline-vertend-glsl.c @@ -469,10 +469,22 @@ _cogl_pipeline_vertend_glsl_end (CoglPipeline *pipeline, uniform */ if (_cogl_pipeline_has_vertex_snippets (pipeline)) { - g_string_append (shader_state->header, - "uniform vec4 _cogl_flip_vector;\n"); - g_string_append (shader_state->source, - " cogl_position_out *= _cogl_flip_vector;\n"); + /* If the backend always needs flipping then we might as + well hardcode the flip instead of using a uniform */ + if (ctx->framebuffer_orientation == + (COGL_RENDERER_FLIP_ONSCREEN | COGL_RENDERER_FLIP_OFFSCREEN)) + { + g_string_append (shader_state->source, + " cogl_position_out *= " + "vec4 (1.0, -1.0, 1.0, 1.0);\n"); + } + else if (ctx->framebuffer_orientation != 0) + { + g_string_append (shader_state->header, + "uniform vec4 _cogl_flip_vector;\n"); + g_string_append (shader_state->source, + " cogl_position_out *= _cogl_flip_vector;\n"); + } } g_string_append (shader_state->source, |