diff options
Diffstat (limited to 'src/mesa/drivers/common/meta.c')
| -rw-r--r-- | src/mesa/drivers/common/meta.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index 08bd899f861..d5e8af3c0a6 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -3685,6 +3685,7 @@ decompress_texture_image(struct gl_context *ctx, /* read pixels from renderbuffer */ { GLenum baseTexFormat = texImage->_BaseFormat; + GLenum destBaseFormat = _mesa_base_tex_format(ctx, destFormat); /* The pixel transfer state will be set to default values at this point * (see MESA_META_PIXEL_TRANSFER) so pixel transfer ops are effectively @@ -3693,9 +3694,19 @@ decompress_texture_image(struct gl_context *ctx, * returned as red and two-channel texture values are returned as * red/alpha. */ - if (baseTexFormat == GL_LUMINANCE || - baseTexFormat == GL_LUMINANCE_ALPHA || - baseTexFormat == GL_INTENSITY) { + if ((baseTexFormat == GL_LUMINANCE || + baseTexFormat == GL_LUMINANCE_ALPHA || + baseTexFormat == GL_INTENSITY) || + /* If we're reading back an RGB(A) texture (using glGetTexImage) as + * luminance then we need to return L=tex(R). + */ + ((baseTexFormat == GL_RGBA || + baseTexFormat == GL_RGB || + baseTexFormat == GL_RG) && + (destBaseFormat == GL_LUMINANCE || + destBaseFormat == GL_LUMINANCE_ALPHA || + destBaseFormat == GL_LUMINANCE_INTEGER_EXT || + destBaseFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT))) { /* Green and blue must be zero */ _mesa_PixelTransferf(GL_GREEN_SCALE, 0.0f); _mesa_PixelTransferf(GL_BLUE_SCALE, 0.0f); |