diff options
| author | Xiang, Haihao <haihao.xiang@intel.com> | 2008-11-19 11:22:35 +0800 |
|---|---|---|
| committer | Xiang, Haihao <haihao.xiang@intel.com> | 2008-11-19 11:30:30 +0800 |
| commit | 2f9ceb158afffe5ea390b909261988267e663e36 (patch) | |
| tree | cd7ac67f37ccbe2ffff5d1de187e12883b191c97 /src/mesa/main | |
| parent | 80d6379722a1249ce13db79a898d340644936f67 (diff) | |
mesa: clamp luminance if needed.
This fixes glReadPixels(GL_LUMINANCE, GL_FLOAT)/glGetTexImage(GL_LUMINANCE, GL_FLOAT) issue
on fixed-point color buffers.
Diffstat (limited to 'src/mesa/main')
| -rw-r--r-- | src/mesa/main/image.c | 2 | ||||
| -rw-r--r-- | src/mesa/main/texstore.c | 10 |
2 files changed, 10 insertions, 2 deletions
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c index 1a6e864b98..4551b4a3b5 100644 --- a/src/mesa/main/image.c +++ b/src/mesa/main/image.c @@ -1689,7 +1689,7 @@ _mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4], if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) { /* compute luminance values */ - if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) { + if (transferOps & IMAGE_CLAMP_BIT) { for (i = 0; i < n; i++) { GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP]; luminance[i] = CLAMP(sum, 0.0F, 1.0F); diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c index abeed3baa1..4b2b129468 100644 --- a/src/mesa/main/texstore.c +++ b/src/mesa/main/texstore.c @@ -3719,6 +3719,14 @@ _mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level, /* general case: convert row to RGBA format */ GLfloat rgba[MAX_WIDTH][4]; GLint col; + GLbitfield transferOps = 0x0; + + if (type == GL_FLOAT && + ((ctx->Color.ClampReadColor == GL_TRUE) || + (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB && + texImage->TexFormat->DataType != GL_FLOAT))) + transferOps |= IMAGE_CLAMP_BIT; + for (col = 0; col < width; col++) { (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]); if (texImage->TexFormat->BaseFormat == GL_ALPHA) { @@ -3743,7 +3751,7 @@ _mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level, } _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format, type, dest, - &ctx->Pack, 0x0 /*image xfer ops*/); + &ctx->Pack, transferOps /*image xfer ops*/); } /* format */ } /* row */ } /* img */ |