diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_gen_mipmap.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_gen_mipmap.c | 846 |
1 files changed, 422 insertions, 424 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_gen_mipmap.c b/mesalib/src/mesa/state_tracker/st_gen_mipmap.c index 0be66a2c2..18eb3be68 100644 --- a/mesalib/src/mesa/state_tracker/st_gen_mipmap.c +++ b/mesalib/src/mesa/state_tracker/st_gen_mipmap.c @@ -1,424 +1,422 @@ -/**************************************************************************
- *
- * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-
-
-#include "main/imports.h"
-#include "main/mipmap.h"
-#include "main/teximage.h"
-
-#include "pipe/p_context.h"
-#include "pipe/p_defines.h"
-#include "util/u_inlines.h"
-#include "util/u_format.h"
-#include "util/u_gen_mipmap.h"
-
-#include "st_debug.h"
-#include "st_context.h"
-#include "st_texture.h"
-#include "st_gen_mipmap.h"
-#include "st_cb_texture.h"
-
-
-/**
- * one-time init for generate mipmap
- * XXX Note: there may be other times we need no-op/simple state like this.
- * In that case, some code refactoring would be good.
- */
-void
-st_init_generate_mipmap(struct st_context *st)
-{
- st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
-}
-
-
-void
-st_destroy_generate_mipmap(struct st_context *st)
-{
- util_destroy_gen_mipmap(st->gen_mipmap);
- st->gen_mipmap = NULL;
-}
-
-
-/**
- * Generate mipmap levels using hardware rendering.
- * \return TRUE if successful, FALSE if not possible
- */
-static boolean
-st_render_mipmap(struct st_context *st,
- GLenum target,
- struct st_texture_object *stObj,
- uint baseLevel, uint lastLevel)
-{
- struct pipe_context *pipe = st->pipe;
- struct pipe_screen *screen = pipe->screen;
- struct pipe_sampler_view *psv = st_get_texture_sampler_view(stObj, pipe);
- const uint face = _mesa_tex_target_to_face(target);
-
- assert(psv->texture == stObj->pt);
-#if 0
- assert(target != GL_TEXTURE_3D); /* implemented but untested */
-#endif
-
- /* check if we can render in the texture's format */
- /* XXX should probably kill this and always use util_gen_mipmap
- since this implements a sw fallback as well */
- if (!screen->is_format_supported(screen, psv->format, psv->texture->target,
- 0, PIPE_BIND_RENDER_TARGET, 0)) {
- return FALSE;
- }
-
- util_gen_mipmap(st->gen_mipmap, psv, face, baseLevel, lastLevel,
- PIPE_TEX_FILTER_LINEAR);
-
- return TRUE;
-}
-
-
-/**
- * Helper function to decompress an image. The result is a 32-bpp RGBA
- * image with stride==width.
- */
-static void
-decompress_image(enum pipe_format format,
- const uint8_t *src, uint8_t *dst,
- unsigned width, unsigned height)
-{
- const struct util_format_description *desc = util_format_description(format);
- const uint bw = util_format_get_blockwidth(format);
- const uint bh = util_format_get_blockheight(format);
- const uint dst_stride = 4 * MAX2(width, bw);
- const uint src_stride = util_format_get_stride(format, width);
-
- desc->unpack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
-
- if (width < bw || height < bh) {
- /* We're decompressing an image smaller than the compression
- * block size. We don't want garbage pixel values in the region
- * outside (width x height) so replicate pixels from the (width
- * x height) region to fill out the (bw x bh) block size.
- */
- uint x, y;
- for (y = 0; y < bh; y++) {
- for (x = 0; x < bw; x++) {
- if (x >= width || y >= height) {
- uint p = (y * bw + x) * 4;
- dst[p + 0] = dst[0];
- dst[p + 1] = dst[1];
- dst[p + 2] = dst[2];
- dst[p + 3] = dst[3];
- }
- }
- }
- }
-}
-
-
-/**
- * Helper function to compress an image. The source is a 32-bpp RGBA image
- * with stride==width.
- */
-static void
-compress_image(enum pipe_format format,
- const uint8_t *src, uint8_t *dst,
- unsigned width, unsigned height)
-{
- const struct util_format_description *desc = util_format_description(format);
- const uint dst_stride = util_format_get_stride(format, width);
- const uint src_stride = 4 * width;
-
- desc->pack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
-}
-
-
-/**
- * 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) {
- datatype = GL_UNSIGNED_BYTE;
- 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(st_context(ctx)->pipe, pt, srcLevel,
- face,
- PIPE_TRANSFER_READ, 0, 0,
- srcWidth, srcHeight);
-
- dstTrans = pipe_get_transfer(st_context(ctx)->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 + 000);
- dstTemp = malloc(dstWidth2 * dstHeight2 * comps + 000);
-
- /* decompress the src image: srcData -> srcTemp */
- decompress_image(format, srcData, srcTemp, srcWidth, srcHeight);
-
- _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, dstTemp, dstData, dstWidth, dstHeight);
-
- 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);
- }
-}
-
-
-/**
- * Compute the expected number of mipmap levels in the texture given
- * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
- * GL_TEXTURE_MAX_LEVEL settings. This will tell us how many mipmap
- * levels should be generated.
- */
-static GLuint
-compute_num_levels(struct gl_context *ctx,
- struct gl_texture_object *texObj,
- GLenum target)
-{
- if (target == GL_TEXTURE_RECTANGLE_ARB) {
- return 1;
- }
- else {
- const struct gl_texture_image *baseImage =
- _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
- GLuint size, numLevels;
-
- size = MAX2(baseImage->Width2, baseImage->Height2);
- size = MAX2(size, baseImage->Depth2);
-
- numLevels = texObj->BaseLevel;
-
- while (size > 0) {
- numLevels++;
- size >>= 1;
- }
-
- numLevels = MIN2(numLevels, texObj->MaxLevel + 1);
-
- assert(numLevels >= 1);
-
- return numLevels;
- }
-}
-
-
-/**
- * Called via ctx->Driver.GenerateMipmap().
- */
-void
-st_generate_mipmap(struct gl_context *ctx, GLenum target,
- struct gl_texture_object *texObj)
-{
- struct st_context *st = st_context(ctx);
- struct st_texture_object *stObj = st_texture_object(texObj);
- struct pipe_resource *pt = st_get_texobj_resource(texObj);
- const uint baseLevel = texObj->BaseLevel;
- uint lastLevel;
- uint dstLevel;
-
- if (!pt)
- return;
-
- /* not sure if this ultimately actually should work,
- but we're not supporting multisampled textures yet. */
- assert(pt->nr_samples < 2);
-
- /* find expected last mipmap level to generate*/
- lastLevel = compute_num_levels(ctx, texObj, target) - 1;
-
- if (lastLevel == 0)
- return;
-
- if (pt->last_level < lastLevel) {
- /* The current gallium texture doesn't have space for all the
- * mipmap levels we need to generate. So allocate a new texture.
- */
- struct pipe_resource *oldTex = stObj->pt;
-
- /* create new texture with space for more levels */
- stObj->pt = st_texture_create(st,
- oldTex->target,
- oldTex->format,
- lastLevel,
- oldTex->width0,
- oldTex->height0,
- oldTex->depth0,
- oldTex->array_size,
- oldTex->bind);
-
- /* The texture isn't in a "complete" state yet so set the expected
- * lastLevel here, since it won't get done in st_finalize_texture().
- */
- stObj->lastLevel = lastLevel;
-
- /* This will copy the old texture's base image into the new texture
- * which we just allocated.
- */
- st_finalize_texture(ctx, st->pipe, texObj);
-
- /* release the old tex (will likely be freed too) */
- pipe_resource_reference(&oldTex, NULL);
- pipe_sampler_view_reference(&stObj->sampler_view, NULL);
-
- pt = stObj->pt;
- }
- else {
- /* Make sure that the base texture image data is present in the
- * texture buffer.
- */
- st_finalize_texture(ctx, st->pipe, texObj);
- }
-
- assert(pt->last_level >= lastLevel);
-
- /* Try to generate the mipmap by rendering/texturing. If that fails,
- * use the software fallback.
- */
- if (!st_render_mipmap(st, target, stObj, baseLevel, lastLevel)) {
- /* since the util code actually also has a fallback, should
- probably make it never fail and kill this */
- fallback_generate_mipmap(ctx, target, texObj);
- }
-
- /* Fill in the Mesa gl_texture_image fields */
- for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
- const uint srcLevel = dstLevel - 1;
- const struct gl_texture_image *srcImage
- = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
- struct gl_texture_image *dstImage;
- struct st_texture_image *stImage;
- uint dstWidth = u_minify(pt->width0, dstLevel);
- uint dstHeight = u_minify(pt->height0, dstLevel);
- uint dstDepth = u_minify(pt->depth0, dstLevel);
- uint border = srcImage->Border;
-
- dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
- if (!dstImage) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
- return;
- }
-
- /* Free old image data */
- if (dstImage->Data)
- ctx->Driver.FreeTexImageData(ctx, dstImage);
-
- /* initialize new image */
- _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
- dstDepth, border, srcImage->InternalFormat,
- srcImage->TexFormat);
-
- stImage = st_texture_image(dstImage);
- stImage->level = dstLevel;
-
- pipe_resource_reference(&stImage->pt, pt);
- }
-}
+/************************************************************************** + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + +#include "main/imports.h" +#include "main/mipmap.h" +#include "main/teximage.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "util/u_inlines.h" +#include "util/u_format.h" +#include "util/u_gen_mipmap.h" + +#include "st_debug.h" +#include "st_context.h" +#include "st_texture.h" +#include "st_gen_mipmap.h" +#include "st_cb_texture.h" + + +/** + * one-time init for generate mipmap + * XXX Note: there may be other times we need no-op/simple state like this. + * In that case, some code refactoring would be good. + */ +void +st_init_generate_mipmap(struct st_context *st) +{ + st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context); +} + + +void +st_destroy_generate_mipmap(struct st_context *st) +{ + util_destroy_gen_mipmap(st->gen_mipmap); + st->gen_mipmap = NULL; +} + + +/** + * Generate mipmap levels using hardware rendering. + * \return TRUE if successful, FALSE if not possible + */ +static boolean +st_render_mipmap(struct st_context *st, + GLenum target, + struct st_texture_object *stObj, + uint baseLevel, uint lastLevel) +{ + struct pipe_context *pipe = st->pipe; + struct pipe_screen *screen = pipe->screen; + struct pipe_sampler_view *psv = st_get_texture_sampler_view(stObj, pipe); + const uint face = _mesa_tex_target_to_face(target); + + assert(psv->texture == stObj->pt); +#if 0 + assert(target != GL_TEXTURE_3D); /* implemented but untested */ +#endif + + /* check if we can render in the texture's format */ + /* XXX should probably kill this and always use util_gen_mipmap + since this implements a sw fallback as well */ + if (!screen->is_format_supported(screen, psv->format, psv->texture->target, + 0, PIPE_BIND_RENDER_TARGET, 0)) { + return FALSE; + } + + util_gen_mipmap(st->gen_mipmap, psv, face, baseLevel, lastLevel, + PIPE_TEX_FILTER_LINEAR); + + return TRUE; +} + + +/** + * Helper function to decompress an image. The result is a 32-bpp RGBA + * image with stride==width. + */ +static void +decompress_image(enum pipe_format format, + const uint8_t *src, uint8_t *dst, + unsigned width, unsigned height, unsigned src_stride) +{ + const struct util_format_description *desc = util_format_description(format); + const uint bw = util_format_get_blockwidth(format); + const uint bh = util_format_get_blockheight(format); + const uint dst_stride = 4 * MAX2(width, bw); + + desc->unpack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height); + + if (width < bw || height < bh) { + /* We're decompressing an image smaller than the compression + * block size. We don't want garbage pixel values in the region + * outside (width x height) so replicate pixels from the (width + * x height) region to fill out the (bw x bh) block size. + */ + uint x, y; + for (y = 0; y < bh; y++) { + for (x = 0; x < bw; x++) { + if (x >= width || y >= height) { + uint p = (y * bw + x) * 4; + dst[p + 0] = dst[0]; + dst[p + 1] = dst[1]; + dst[p + 2] = dst[2]; + dst[p + 3] = dst[3]; + } + } + } + } +} + + +/** + * Helper function to compress an image. The source is a 32-bpp RGBA image + * with stride==width. + */ +static void +compress_image(enum pipe_format format, + const uint8_t *src, uint8_t *dst, + unsigned width, unsigned height, unsigned dst_stride) +{ + const struct util_format_description *desc = util_format_description(format); + const uint src_stride = 4 * width; + + desc->pack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height); +} + + +/** + * 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) { + datatype = GL_UNSIGNED_BYTE; + 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(st_context(ctx)->pipe, pt, srcLevel, + face, + PIPE_TRANSFER_READ, 0, 0, + srcWidth, srcHeight); + + dstTrans = pipe_get_transfer(st_context(ctx)->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 + 000); + dstTemp = malloc(dstWidth2 * dstHeight2 * comps + 000); + + /* decompress the src image: srcData -> srcTemp */ + decompress_image(format, srcData, srcTemp, srcWidth, srcHeight, 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, dstTemp, dstData, dstWidth, dstHeight, 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); + } +} + + +/** + * Compute the expected number of mipmap levels in the texture given + * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/ + * GL_TEXTURE_MAX_LEVEL settings. This will tell us how many mipmap + * levels should be generated. + */ +static GLuint +compute_num_levels(struct gl_context *ctx, + struct gl_texture_object *texObj, + GLenum target) +{ + if (target == GL_TEXTURE_RECTANGLE_ARB) { + return 1; + } + else { + const struct gl_texture_image *baseImage = + _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel); + GLuint size, numLevels; + + size = MAX2(baseImage->Width2, baseImage->Height2); + size = MAX2(size, baseImage->Depth2); + + numLevels = texObj->BaseLevel; + + while (size > 0) { + numLevels++; + size >>= 1; + } + + numLevels = MIN2(numLevels, texObj->MaxLevel + 1); + + assert(numLevels >= 1); + + return numLevels; + } +} + + +/** + * Called via ctx->Driver.GenerateMipmap(). + */ +void +st_generate_mipmap(struct gl_context *ctx, GLenum target, + struct gl_texture_object *texObj) +{ + struct st_context *st = st_context(ctx); + struct st_texture_object *stObj = st_texture_object(texObj); + struct pipe_resource *pt = st_get_texobj_resource(texObj); + const uint baseLevel = texObj->BaseLevel; + uint lastLevel; + uint dstLevel; + + if (!pt) + return; + + /* not sure if this ultimately actually should work, + but we're not supporting multisampled textures yet. */ + assert(pt->nr_samples < 2); + + /* find expected last mipmap level to generate*/ + lastLevel = compute_num_levels(ctx, texObj, target) - 1; + + if (lastLevel == 0) + return; + + if (pt->last_level < lastLevel) { + /* The current gallium texture doesn't have space for all the + * mipmap levels we need to generate. So allocate a new texture. + */ + struct pipe_resource *oldTex = stObj->pt; + + /* create new texture with space for more levels */ + stObj->pt = st_texture_create(st, + oldTex->target, + oldTex->format, + lastLevel, + oldTex->width0, + oldTex->height0, + oldTex->depth0, + oldTex->array_size, + oldTex->bind); + + /* The texture isn't in a "complete" state yet so set the expected + * lastLevel here, since it won't get done in st_finalize_texture(). + */ + stObj->lastLevel = lastLevel; + + /* This will copy the old texture's base image into the new texture + * which we just allocated. + */ + st_finalize_texture(ctx, st->pipe, texObj); + + /* release the old tex (will likely be freed too) */ + pipe_resource_reference(&oldTex, NULL); + pipe_sampler_view_reference(&stObj->sampler_view, NULL); + + pt = stObj->pt; + } + else { + /* Make sure that the base texture image data is present in the + * texture buffer. + */ + st_finalize_texture(ctx, st->pipe, texObj); + } + + assert(pt->last_level >= lastLevel); + + /* Try to generate the mipmap by rendering/texturing. If that fails, + * use the software fallback. + */ + if (!st_render_mipmap(st, target, stObj, baseLevel, lastLevel)) { + /* since the util code actually also has a fallback, should + probably make it never fail and kill this */ + fallback_generate_mipmap(ctx, target, texObj); + } + + /* Fill in the Mesa gl_texture_image fields */ + for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) { + const uint srcLevel = dstLevel - 1; + const struct gl_texture_image *srcImage + = _mesa_get_tex_image(ctx, texObj, target, srcLevel); + struct gl_texture_image *dstImage; + struct st_texture_image *stImage; + uint dstWidth = u_minify(pt->width0, dstLevel); + uint dstHeight = u_minify(pt->height0, dstLevel); + uint dstDepth = u_minify(pt->depth0, dstLevel); + uint border = srcImage->Border; + + dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel); + if (!dstImage) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); + return; + } + + /* Free old image data */ + if (dstImage->Data) + ctx->Driver.FreeTexImageData(ctx, dstImage); + + /* initialize new image */ + _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight, + dstDepth, border, srcImage->InternalFormat, + srcImage->TexFormat); + + stImage = st_texture_image(dstImage); + stImage->level = dstLevel; + + pipe_resource_reference(&stImage->pt, pt); + } +} |