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Diffstat (limited to 'mesalib/src/mesa/main/mipmap.c')
-rw-r--r--mesalib/src/mesa/main/mipmap.c48
1 files changed, 23 insertions, 25 deletions
diff --git a/mesalib/src/mesa/main/mipmap.c b/mesalib/src/mesa/main/mipmap.c
index 51f7edfab..3d1a4c49c 100644
--- a/mesalib/src/mesa/main/mipmap.c
+++ b/mesalib/src/mesa/main/mipmap.c
@@ -415,7 +415,7 @@ do_row(GLenum datatype, GLuint comps, GLint srcWidth,
GLuint i, j, k;
const GLuint *rowA = (const GLuint *) srcRowA;
const GLuint *rowB = (const GLuint *) srcRowB;
- GLfloat *dst = (GLfloat *) dstRow;
+ GLuint *dst = (GLuint *) dstRow;
for (i = j = 0, k = k0; i < (GLuint) dstWidth;
i++, j += colStride, k += colStride) {
dst[i] = (GLfloat)(rowA[j] / 4 + rowA[k] / 4 + rowB[j] / 4 + rowB[k] / 4);
@@ -1005,21 +1005,28 @@ make_2d_mipmap(GLenum datatype, GLuint comps, GLint border,
const GLint dstRowBytes = bpt * dstRowStride;
const GLubyte *srcA, *srcB;
GLubyte *dst;
- GLint row;
+ GLint row, srcRowStep;
/* Compute src and dst pointers, skipping any border */
srcA = srcPtr + border * ((srcWidth + 1) * bpt);
- if (srcHeight > 1)
+ if (srcHeight > 1 && srcHeight > dstHeight) {
+ /* sample from two source rows */
srcB = srcA + srcRowBytes;
- else
+ srcRowStep = 2;
+ }
+ else {
+ /* sample from one source row */
srcB = srcA;
+ srcRowStep = 1;
+ }
+
dst = dstPtr + border * ((dstWidth + 1) * bpt);
for (row = 0; row < dstHeightNB; row++) {
do_row(datatype, comps, srcWidthNB, srcA, srcB,
dstWidthNB, dst);
- srcA += 2 * srcRowBytes;
- srcB += 2 * srcRowBytes;
+ srcA += srcRowStep * srcRowBytes;
+ srcB += srcRowStep * srcRowBytes;
dst += dstRowBytes;
}
@@ -1581,7 +1588,7 @@ _mesa_generate_mipmap(GLcontext *ctx, GLenum target,
struct gl_texture_image *dstImage;
GLint srcWidth, srcHeight, srcDepth;
GLint dstWidth, dstHeight, dstDepth;
- GLint border, bytesPerTexel;
+ GLint border;
GLboolean nextLevel;
/* get src image parameters */
@@ -1623,33 +1630,24 @@ _mesa_generate_mipmap(GLcontext *ctx, GLenum target,
dstImage->FetchTexelc = srcImage->FetchTexelc;
dstImage->FetchTexelf = srcImage->FetchTexelf;
- /* Alloc new teximage data buffer.
- * Setup src and dest data pointers.
- */
- if (_mesa_is_format_compressed(dstImage->TexFormat)) {
- GLuint dstCompressedSize =
- _mesa_format_image_size(dstImage->TexFormat, dstImage->Width,
- dstImage->Height, dstImage->Depth);
- ASSERT(dstCompressedSize > 0);
-
- dstImage->Data = _mesa_alloc_texmemory(dstCompressedSize);
+ /* Alloc new teximage data buffer */
+ {
+ GLuint size = _mesa_format_image_size(dstImage->TexFormat,
+ dstWidth, dstHeight, dstDepth);
+ dstImage->Data = _mesa_alloc_texmemory(size);
if (!dstImage->Data) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
return;
}
+ }
+
+ /* Setup src and dest data pointers */
+ if (_mesa_is_format_compressed(dstImage->TexFormat)) {
/* srcData and dstData are already set */
ASSERT(srcData);
ASSERT(dstData);
}
else {
- bytesPerTexel = _mesa_get_format_bytes(dstImage->TexFormat);
- ASSERT(dstWidth * dstHeight * dstDepth * bytesPerTexel > 0);
- dstImage->Data = _mesa_alloc_texmemory(dstWidth * dstHeight
- * dstDepth * bytesPerTexel);
- if (!dstImage->Data) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
- return;
- }
srcData = (const GLubyte *) srcImage->Data;
dstData = (GLubyte *) dstImage->Data;
}