static void
fallback_generate_mipmap(GLcontext *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct pipe_context *pipe = ctx->st->pipe;
struct pipe_screen *screen = pipe->screen;
struct pipe_texture *pt = st_get_texobj_texture(texObj);
const uint baseLevel = texObj->BaseLevel;
const uint lastLevel = pt->last_level;
const uint face = _mesa_tex_target_to_face(target), zslice = 0;
uint dstLevel;
GLenum datatype;
GLuint comps;
assert(target != GL_TEXTURE_3D); /* not done yet */
_mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
&datatype, &comps);
for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
const uint srcLevel = dstLevel - 1;
struct pipe_transfer *srcTrans, *dstTrans;
const ubyte *srcData;
ubyte *dstData;
int srcStride, dstStride;
srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
srcLevel, zslice,
PIPE_TRANSFER_READ, 0, 0,
pt->width[srcLevel],
pt->height[srcLevel]);
dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
dstLevel, zslice,
PIPE_TRANSFER_WRITE, 0, 0,
pt->width[dstLevel],
pt->height[dstLevel]);
srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
srcStride = srcTrans->stride / srcTrans->block.size;
dstStride = dstTrans->stride / dstTrans->block.size;
_mesa_generate_mipmap_level(target, datatype, comps,
0 /*border*/,
pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
srcData,
srcStride, /* stride in texels */
pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
dstData,
dstStride); /* stride in texels */
screen->transfer_unmap(screen, srcTrans);
screen->transfer_unmap(screen, dstTrans);
screen->tex_transfer_destroy(srcTrans);
screen->tex_transfer_destroy(dstTrans);
}
}
/**
* Software fallback for generate mipmap levels.
*/
static void
fallback_generate_mipmap(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct pipe_resource *pt = st_get_texobj_resource(texObj);
const uint baseLevel = texObj->BaseLevel;
const uint lastLevel = pt->last_level;
const uint face = _mesa_tex_target_to_face(target);
uint dstLevel;
GLenum datatype;
GLuint comps;
GLboolean compressed;
if (ST_DEBUG & DEBUG_FALLBACK)
debug_printf("%s: fallback processing\n", __FUNCTION__);
assert(target != GL_TEXTURE_3D); /* not done yet */
compressed =
_mesa_is_format_compressed(texObj->Image[face][baseLevel]->TexFormat);
if (compressed) {
GLenum type =
_mesa_get_format_datatype(texObj->Image[face][baseLevel]->TexFormat);
datatype = type == GL_UNSIGNED_NORMALIZED ? GL_UNSIGNED_BYTE : GL_FLOAT;
comps = 4;
}
else {
_mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
&datatype, &comps);
assert(comps > 0 && "bad texture format in fallback_generate_mipmap()");
}
for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
const uint srcLevel = dstLevel - 1;
const uint srcWidth = u_minify(pt->width0, srcLevel);
const uint srcHeight = u_minify(pt->height0, srcLevel);
const uint srcDepth = u_minify(pt->depth0, srcLevel);
const uint dstWidth = u_minify(pt->width0, dstLevel);
const uint dstHeight = u_minify(pt->height0, dstLevel);
const uint dstDepth = u_minify(pt->depth0, dstLevel);
struct pipe_transfer *srcTrans, *dstTrans;
const ubyte *srcData;
ubyte *dstData;
int srcStride, dstStride;
srcTrans = pipe_get_transfer(pipe, pt, srcLevel,
face,
PIPE_TRANSFER_READ, 0, 0,
srcWidth, srcHeight);
dstTrans = pipe_get_transfer(pipe, pt, dstLevel,
face,
PIPE_TRANSFER_WRITE, 0, 0,
dstWidth, dstHeight);
srcData = (ubyte *) pipe_transfer_map(pipe, srcTrans);
dstData = (ubyte *) pipe_transfer_map(pipe, dstTrans);
srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->resource->format);
dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->resource->format);
/* this cannot work correctly for 3d since it does
not respect layerStride. */
if (compressed) {
const enum pipe_format format = pt->format;
const uint bw = util_format_get_blockwidth(format);
const uint bh = util_format_get_blockheight(format);
const uint srcWidth2 = align(srcWidth, bw);
const uint srcHeight2 = align(srcHeight, bh);
const uint dstWidth2 = align(dstWidth, bw);
const uint dstHeight2 = align(dstHeight, bh);
uint8_t *srcTemp, *dstTemp;
assert(comps == 4);
srcTemp = malloc(srcWidth2 * srcHeight2 * comps * (datatype == GL_FLOAT ? 4 : 1));
dstTemp = malloc(dstWidth2 * dstHeight2 * comps * (datatype == GL_FLOAT ? 4 : 1));
/* decompress the src image: srcData -> srcTemp */
decompress_image(format, datatype, srcData, srcTemp, srcWidth2, srcHeight2, srcTrans->stride);
_mesa_generate_mipmap_level(target, datatype, comps,
0 /*border*/,
srcWidth2, srcHeight2, srcDepth,
srcTemp,
srcWidth2, /* stride in texels */
dstWidth2, dstHeight2, dstDepth,
dstTemp,
dstWidth2); /* stride in texels */
/* compress the new image: dstTemp -> dstData */
compress_image(format, datatype, dstTemp, dstData, dstWidth2, dstHeight2, dstTrans->stride);
free(srcTemp);
free(dstTemp);
}
else {
_mesa_generate_mipmap_level(target, datatype, comps,
0 /*border*/,
srcWidth, srcHeight, srcDepth,
srcData,
srcStride, /* stride in texels */
dstWidth, dstHeight, dstDepth,
dstData,
dstStride); /* stride in texels */
}
pipe_transfer_unmap(pipe, srcTrans);
pipe_transfer_unmap(pipe, dstTrans);
pipe->transfer_destroy(pipe, srcTrans);
pipe->transfer_destroy(pipe, dstTrans);
}
}
