GLuint maxLevel)
{
GLint level;
- gl_format convertFormat;
- const GLubyte *srcData = NULL;
- GLubyte *dstData = NULL;
GLenum datatype;
GLuint comps;
- /* Find convertFormat - the format that do_row() will process */
- if (_mesa_is_format_compressed(srcImage->TexFormat)) {
- /* setup for compressed textures - need to allocate temporary
- * image buffers to hold uncompressed images.
- */
- GLuint row;
- GLint components, size;
- GLchan *dst;
-
- assert(texObj->Target == GL_TEXTURE_2D ||
- texObj->Target == GL_TEXTURE_CUBE_MAP_ARB);
-
- if (srcImage->_BaseFormat == GL_RGB) {
- convertFormat = MESA_FORMAT_RGB888;
- components = 3;
- } else if (srcImage->_BaseFormat == GL_RED) {
- convertFormat = MESA_FORMAT_R8;
- components = 1;
- } else if (srcImage->_BaseFormat == GL_RG) {
- convertFormat = MESA_FORMAT_RG88;
- components = 2;
- } else if (srcImage->_BaseFormat == GL_RGBA) {
- convertFormat = MESA_FORMAT_RGBA8888;
- components = 4;
- } else if (srcImage->_BaseFormat == GL_LUMINANCE) {
- convertFormat = MESA_FORMAT_L8;
- components = 1;
- } else if (srcImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
- convertFormat = MESA_FORMAT_AL88;
- components = 2;
- } else {
- _mesa_problem(ctx, "bad srcImage->_BaseFormat in _mesa_generate_mipmaps");
- return;
- }
-
- /* allocate storage for uncompressed GL_RGB or GL_RGBA images */
- size = _mesa_bytes_per_pixel(srcImage->_BaseFormat, CHAN_TYPE)
- * srcImage->Width * srcImage->Height * srcImage->Depth + 20;
- /* 20 extra bytes, just be safe when calling last FetchTexel */
- srcData = (GLubyte *) malloc(size);
- if (!srcData) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps");
- return;
- }
- dstData = (GLubyte *) malloc(size / 2); /* 1/4 would probably be OK */
- if (!dstData) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps");
- free((void *) srcData);
- return;
- }
-
- /* decompress base image here */
- dst = (GLchan *) srcData;
- for (row = 0; row < srcImage->Height; row++) {
- GLuint col;
- for (col = 0; col < srcImage->Width; col++) {
- srcImage->FetchTexelc(srcImage, col, row, 0, dst);
- dst += components;
- }
- }
- }
- else {
- /* uncompressed */
- convertFormat = srcImage->TexFormat;
- }
-
- _mesa_format_to_type_and_comps(convertFormat, &datatype, &comps);
+ _mesa_format_to_type_and_comps(srcImage->TexFormat, &datatype, &comps);
for (level = texObj->BaseLevel; level < maxLevel; level++) {
/* generate image[level+1] from image[level] */
nextLevel = next_mipmap_level_size(target, border,
srcWidth, srcHeight, srcDepth,
&dstWidth, &dstHeight, &dstDepth);
- if (!nextLevel) {
- /* all done */
- if (_mesa_is_format_compressed(srcImage->TexFormat)) {
- free((void *) srcData);
- free(dstData);
- }
+ if (!nextLevel)
return;
- }
/* get dest gl_texture_image */
dstImage = _mesa_get_tex_image(ctx, texObj, target, level + 1);
}
}
- /* Setup src and dest data pointers */
- if (_mesa_is_format_compressed(dstImage->TexFormat)) {
- /* srcData and dstData are already set */
- ASSERT(srcData);
- ASSERT(dstData);
- }
- else {
- srcData = (const GLubyte *) srcImage->Data;
- dstData = (GLubyte *) dstImage->Data;
- }
-
ASSERT(dstImage->TexFormat);
ASSERT(dstImage->FetchTexelc);
ASSERT(dstImage->FetchTexelf);
_mesa_generate_mipmap_level(target, datatype, comps, border,
srcWidth, srcHeight, srcDepth,
- srcData, srcImage->RowStride,
+ srcImage->Data, srcImage->RowStride,
dstWidth, dstHeight, dstDepth,
- dstData, dstImage->RowStride);
-
-
- if (_mesa_is_format_compressed(dstImage->TexFormat)) {
- GLubyte *temp;
- /* compress image from dstData into dstImage->Data */
- const GLenum srcFormat = _mesa_get_format_base_format(convertFormat);
- GLint dstRowStride
- = _mesa_format_row_stride(dstImage->TexFormat, dstWidth);
-
- _mesa_texstore(ctx, 2, dstImage->_BaseFormat,
- dstImage->TexFormat,
- dstImage->Data,
- 0, 0, 0, /* dstX/Y/Zoffset */
- dstRowStride, 0, /* strides */
- dstWidth, dstHeight, 1, /* size */
- srcFormat, CHAN_TYPE,
- dstData, /* src data, actually */
- &ctx->DefaultPacking);
-
- /* swap src and dest pointers */
- temp = (GLubyte *) srcData;
- srcData = dstData;
- dstData = temp;
- }
+ dstImage->Data, dstImage->RowStride);
} /* loop over mipmap levels */
}