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/**************************************************************************
*
* 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 "main/texformat.h"
#include "shader/prog_instruction.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_inlines.h"
#include "util/u_gen_mipmap.h"
#include "cso_cache/cso_cache.h"
#include "cso_cache/cso_context.h"
#include "st_context.h"
#include "st_draw.h"
#include "st_gen_mipmap.h"
#include "st_program.h"
#include "st_texture.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 pipe_texture *pt,
uint baseLevel, uint lastLevel)
{
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
const uint face = _mesa_tex_target_to_face(target);
assert(target != GL_TEXTURE_3D); /* not done yet */
/* check if we can render in the texture's format */
if (!screen->is_format_supported(screen, pt->format, target,
PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
return FALSE;
}
util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
PIPE_TEX_FILTER_LINEAR);
return TRUE;
}
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;
srcTrans = screen->get_tex_transfer(screen, pt, face, srcLevel, zslice,
PIPE_TRANSFER_READ, 0, 0,
pt->width[srcLevel],
pt->height[srcLevel]);
dstTrans = screen->get_tex_transfer(screen, 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);
_mesa_generate_mipmap_level(target, datatype, comps,
0 /*border*/,
pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
srcData,
srcTrans->stride, /* stride in bytes */
pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
dstData,
dstTrans->stride); /* stride in bytes */
screen->transfer_unmap(screen, srcTrans);
screen->transfer_unmap(screen, dstTrans);
screen->tex_transfer_release(screen, &srcTrans);
screen->tex_transfer_release(screen, &dstTrans);
}
}
void
st_generate_mipmap(GLcontext *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct st_context *st = ctx->st;
struct pipe_texture *pt = st_get_texobj_texture(texObj);
const uint baseLevel = texObj->BaseLevel;
uint lastLevel;
uint dstLevel;
if (!pt)
return;
lastLevel = pt->last_level;
if (!st_render_mipmap(st, target, pt, baseLevel, lastLevel)) {
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 = pt->width[dstLevel];
uint dstHeight = pt->height[dstLevel];
uint dstDepth = pt->depth[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;
}
if (dstImage->ImageOffsets)
_mesa_free(dstImage->ImageOffsets);
/* 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);
dstImage->TexFormat = srcImage->TexFormat;
stImage = (struct st_texture_image *) dstImage;
pipe_texture_reference(&stImage->pt, pt);
}
}
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