aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/mesa/state_tracker/st_gen_mipmap.c
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2011-05-29 15:02:10 +0200
committermarha <marha@users.sourceforge.net>2011-05-29 15:02:10 +0200
commit1ccf18dc09e288ddf937aa890b50c8d0a9df4319 (patch)
treea08f093a56109dd213582d26534b7ead87e86695 /mesalib/src/mesa/state_tracker/st_gen_mipmap.c
parent741ef6e15af761d44ca0d8d54f6b99c33dd1b6bd (diff)
downloadvcxsrv-1ccf18dc09e288ddf937aa890b50c8d0a9df4319.tar.gz
vcxsrv-1ccf18dc09e288ddf937aa890b50c8d0a9df4319.tar.bz2
vcxsrv-1ccf18dc09e288ddf937aa890b50c8d0a9df4319.zip
libX11 mesa mkfontscale pixman xserver git update 29 Mar 2011
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_gen_mipmap.c')
-rw-r--r--mesalib/src/mesa/state_tracker/st_gen_mipmap.c902
1 files changed, 451 insertions, 451 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_gen_mipmap.c b/mesalib/src/mesa/state_tracker/st_gen_mipmap.c
index 2c37c1107..b34794f1b 100644
--- a/mesalib/src/mesa/state_tracker/st_gen_mipmap.c
+++ b/mesalib/src/mesa/state_tracker/st_gen_mipmap.c
@@ -1,451 +1,451 @@
-/**************************************************************************
- *
- * 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)) {
- 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, int datatype,
- const uint8_t *src, void *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);
- uint dst_stride = 4 * MAX2(width, bw);
-
- if (datatype == GL_FLOAT) {
- desc->unpack_rgba_float((float *)dst, dst_stride * sizeof(GLfloat), src, src_stride, width, height);
- if (width < bw || height < bh) {
- float *dst_p = (float *)dst;
- /* 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[p + 0] = dst_p[0];
- dst_p[p + 1] = dst_p[1];
- dst_p[p + 2] = dst_p[2];
- dst_p[p + 3] = dst_p[3];
- }
- }
- }
- }
- } else {
- desc->unpack_rgba_8unorm((uint8_t *)dst, dst_stride, src, src_stride, width, height);
- if (width < bw || height < bh) {
- uint8_t *dst_p = (uint8_t *)dst;
- /* 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[p + 0] = dst_p[0];
- dst_p[p + 1] = dst_p[1];
- dst_p[p + 2] = dst_p[2];
- dst_p[p + 3] = dst_p[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, int datatype,
- const void *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;
-
- if (datatype == GL_FLOAT)
- desc->pack_rgba_float(dst, dst_stride, (GLfloat *)src, src_stride * sizeof(GLfloat), width, height);
- else
- desc->pack_rgba_8unorm(dst, dst_stride, (uint8_t *)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) {
- 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(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 * (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);
- }
-}
-
-
-/**
- * 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;
-
- /* 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;
-
- 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);
-
- /* 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);
- }
- else {
- /* Make sure that the base texture image data is present in the
- * texture buffer.
- */
- st_finalize_texture(ctx, st->pipe, texObj);
- }
-
- pt = stObj->pt;
-
- 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)) {
+ 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, int datatype,
+ const uint8_t *src, void *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);
+ uint dst_stride = 4 * MAX2(width, bw);
+
+ if (datatype == GL_FLOAT) {
+ desc->unpack_rgba_float((float *)dst, dst_stride * sizeof(GLfloat), src, src_stride, width, height);
+ if (width < bw || height < bh) {
+ float *dst_p = (float *)dst;
+ /* 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[p + 0] = dst_p[0];
+ dst_p[p + 1] = dst_p[1];
+ dst_p[p + 2] = dst_p[2];
+ dst_p[p + 3] = dst_p[3];
+ }
+ }
+ }
+ }
+ } else {
+ desc->unpack_rgba_8unorm((uint8_t *)dst, dst_stride, src, src_stride, width, height);
+ if (width < bw || height < bh) {
+ uint8_t *dst_p = (uint8_t *)dst;
+ /* 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[p + 0] = dst_p[0];
+ dst_p[p + 1] = dst_p[1];
+ dst_p[p + 2] = dst_p[2];
+ dst_p[p + 3] = dst_p[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, int datatype,
+ const void *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;
+
+ if (datatype == GL_FLOAT)
+ desc->pack_rgba_float(dst, dst_stride, (GLfloat *)src, src_stride * sizeof(GLfloat), width, height);
+ else
+ desc->pack_rgba_8unorm(dst, dst_stride, (uint8_t *)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) {
+ 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);
+ }
+}
+
+
+/**
+ * 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;
+
+ /* 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;
+
+ 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);
+
+ /* 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);
+ }
+ else {
+ /* Make sure that the base texture image data is present in the
+ * texture buffer.
+ */
+ st_finalize_texture(ctx, st->pipe, texObj);
+ }
+
+ pt = stObj->pt;
+
+ 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);
+ }
+}