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Fix endianness bug in _mesa_texstore_argb8888() 

On big-endian, storing in _mesa_texformat_argb8888 format produced wrong res
Also, clean-up nearby code to match.

picked from gallium-0.1 branch
This commit is contained in:
Brian 2007-12-05 15:06:23 -07:00
parent 2407e48f28
commit 259eacfa94
1 changed files with 13 additions and 11 deletions
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24
src/mesa/main/texstore.c
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@ -1443,7 +1443,6 @@ _mesa_texstore_argb8888(TEXSTORE_PARAMS)
(baseInternalFormat == GL_RGBA ||
baseInternalFormat == GL_RGB) &&
srcType == GL_UNSIGNED_BYTE) {
int img, row, col;
for (img = 0; img < srcDepth; img++) {
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
@ -1455,11 +1454,12 @@ _mesa_texstore_argb8888(TEXSTORE_PARAMS)
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (row = 0; row < srcHeight; row++) {
GLuint *d4 = (GLuint *) dstRow;
for (col = 0; col < srcWidth; col++) {
dstRow[col * 4 + 0] = srcRow[col * 3 + BCOMP];
dstRow[col * 4 + 1] = srcRow[col * 3 + GCOMP];
dstRow[col * 4 + 2] = srcRow[col * 3 + RCOMP];
dstRow[col * 4 + 3] = 0xff;
d4[col] = ((0xff << 24) |
(srcRow[col * 3 + RCOMP] << 16) |
(srcRow[col * 3 + GCOMP] << 8) |
(srcRow[col * 3 + BCOMP] << 0));
}
dstRow += dstRowStride;
srcRow += srcRowStride;
@ -1471,7 +1471,9 @@ _mesa_texstore_argb8888(TEXSTORE_PARAMS)
dstFormat == &_mesa_texformat_argb8888 &&
srcFormat == GL_RGBA &&
baseInternalFormat == GL_RGBA &&
(srcType == GL_UNSIGNED_BYTE && littleEndian)) {
srcType == GL_UNSIGNED_BYTE &&
littleEndian) {
/* same as above case, but src data has alpha too */
GLint img, row, col;
/* For some reason, streaming copies to write-combined regions
* are extremely sensitive to the characteristics of how the
@ -1488,13 +1490,13 @@ _mesa_texstore_argb8888(TEXSTORE_PARAMS)
+ dstImageOffsets[dstZoffset + img] * dstFormat->TexelBytes
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (row = 0; row < srcHeight; row++) {
GLuint *d4 = (GLuint *) dstRow;
for (col = 0; col < srcWidth; col++) {
*(GLuint *)(dstRow + col * 4) = (srcRow[col * 4 + RCOMP] << 16 |
srcRow[col * 4 + GCOMP] << 8 |
srcRow[col * 4 + BCOMP] << 0 |
srcRow[col * 4 + ACOMP] << 24);
d4[col] = ((srcRow[col * 4 + ACOMP] << 24) |
(srcRow[col * 4 + RCOMP] << 16) |
(srcRow[col * 4 + GCOMP] << 8) |
(srcRow[col * 4 + BCOMP] << 0));
}
dstRow += dstRowStride;
srcRow += srcRowStride;