diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_cb_readpixels.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_cb_readpixels.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_cb_readpixels.c b/mesalib/src/mesa/state_tracker/st_cb_readpixels.c index 08f53054d..2c2da42c4 100644 --- a/mesalib/src/mesa/state_tracker/st_cb_readpixels.c +++ b/mesalib/src/mesa/state_tracker/st_cb_readpixels.c @@ -198,6 +198,7 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb, const struct gl_pixelstore_attrib *pack,
GLvoid *dest)
{
+ GLubyte alphaORoperand;
enum combination {
A8R8G8B8_UNORM_TO_RGBA_UBYTE,
A8R8G8B8_UNORM_TO_RGB_UBYTE,
@@ -208,20 +209,26 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb, if (ctx->_ImageTransferState)
return GL_FALSE;
- if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
- format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
+ if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM) {
+ alphaORoperand = 0;
+ }
+ else if (strb->format == PIPE_FORMAT_B8G8R8X8_UNORM ) {
+ alphaORoperand = 0xff;
+ }
+ else {
+ return GL_FALSE;
+ }
+
+ if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
combo = A8R8G8B8_UNORM_TO_RGBA_UBYTE;
}
- else if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
- format == GL_RGB && type == GL_UNSIGNED_BYTE) {
+ else if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
combo = A8R8G8B8_UNORM_TO_RGB_UBYTE;
}
- else if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
- format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV) {
+ else if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV) {
combo = A8R8G8B8_UNORM_TO_BGRA_UINT;
}
- else if (strb->format == PIPE_FORMAT_B8G8R8A8_UNORM &&
- format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8) {
+ else if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8) {
combo = A8R8G8B8_UNORM_TO_RGBA_UINT;
}
else {
@@ -283,7 +290,7 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb, dst[col*4+0] = (pixel >> 16) & 0xff;
dst[col*4+1] = (pixel >> 8) & 0xff;
dst[col*4+2] = (pixel >> 0) & 0xff;
- dst[col*4+3] = (pixel >> 24) & 0xff;
+ dst[col*4+3] = ((pixel >> 24) & 0xff) | alphaORoperand;
}
dst += dstStride;
y += dy;
@@ -306,6 +313,12 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb, for (row = 0; row < height; row++) {
const GLubyte *src = map + y * trans->stride;
memcpy(dst, src, 4 * width);
+ if (alphaORoperand) {
+ assert(alphaORoperand == 0xff);
+ for (col = 0; col < width; col++) {
+ dst[col*4+3] = 0xff;
+ }
+ }
dst += dstStride;
y += dy;
}
@@ -315,7 +328,7 @@ st_fast_readpixels(struct gl_context *ctx, struct st_renderbuffer *strb, const GLubyte *src = map + y * trans->stride;
for (col = 0; col < width; col++) {
GLuint pixel = ((GLuint *) src)[col];
- dst[col*4+0] = (pixel >> 24) & 0xff;
+ dst[col*4+0] = ((pixel >> 24) & 0xff) | alphaORoperand;
dst[col*4+1] = (pixel >> 0) & 0xff;
dst[col*4+2] = (pixel >> 8) & 0xff;
dst[col*4+3] = (pixel >> 16) & 0xff;
|