diff options
| author | Eric Anholt <[email protected]> | 2011-06-08 13:00:51 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2011-06-13 15:56:36 -0700 |
| commit | 296e6b9038131cd246226881208ffebe3c2683c3 (patch) | |
| tree | a776fd1f31f073bcb8b746a26cac17df3e879599 /src | |
| parent | df46eb8ec082e020ae7e45d3f584cb1d3dd55653 (diff) | |
meta: Fix glCopyTexImage(GL_LUMINANCE) from non-GL_LUMINANCE source.
glReadPixels() was performing RGB -> L conversion differently from the
glTexImage() style conversion appropriate for glCopyTexImage().
Fixes gles2conform copy_texture.
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/common/meta.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index 979926a7e8f..0e58aeca3f5 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -2691,12 +2691,26 @@ copy_tex_image(struct gl_context *ctx, GLuint dims, GLenum target, GLint level, GLenum format, type; GLint bpp; void *buf; + struct gl_renderbuffer *read_rb = ctx->ReadBuffer->_ColorReadBuffer; texObj = _mesa_get_current_tex_object(ctx, target); texImage = _mesa_get_tex_image(ctx, texObj, target, level); /* Choose format/type for temporary image buffer */ format = _mesa_base_tex_format(ctx, internalFormat); + + if (format == GL_LUMINANCE && + _mesa_get_format_base_format(read_rb->Format) != GL_LUMINANCE) { + /* The glReadPixels() path will convert RGB to luminance by + * summing R+G+B. glCopyTexImage() is supposed to behave as + * glCopyPixels, which doesn't do that change, and instead + * leaves it up to glTexImage which converts RGB to luminance by + * just taking the R channel. To avoid glReadPixels() trashing + * our data, use RGBA for our temporary image. + */ + format = GL_RGBA; + } + type = get_temp_image_type(ctx, format); bpp = _mesa_bytes_per_pixel(format, type); if (bpp <= 0) { |