diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/buffers.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index 6cbce9d5da2..b13a7af65a6 100644 --- a/src/mesa/main/buffers.c +++ b/src/mesa/main/buffers.c @@ -101,7 +101,7 @@ draw_buffer_enum_to_bitmask(const struct gl_context *ctx, GLenum buffer) case GL_FRONT: return BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT; case GL_BACK: - if (_mesa_is_gles3(ctx)) { + if (_mesa_is_gles(ctx)) { /* Page 181 (page 192 of the PDF) in section 4.2.1 of the OpenGL * ES 3.0.1 specification says: * @@ -111,6 +111,11 @@ draw_buffer_enum_to_bitmask(const struct gl_context *ctx, GLenum buffer) * * Since there is no stereo rendering in ES 3.0, only return the * LEFT bits. This also satisfies the "n must be 1" requirement. + * + * We also do this for GLES 1 and 2 because those APIs have no + * concept of selecting the front and back buffer anyway and it's + * convenient to be able to maintain the magic behaviour of + * GL_BACK in that case. */ if (ctx->DrawBuffer->Visual.doubleBufferMode) return BUFFER_BIT_BACK_LEFT; |