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;
}
/* 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);
}
}
/**
* 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 */
_mesa_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 border = srcImage->Border;
uint dstWidth, dstHeight, dstDepth;
dstWidth = u_minify(pt->width0, dstLevel);
if (texObj->Target == GL_TEXTURE_1D_ARRAY) {
dstHeight = pt->array_size;
}
else {
dstHeight = u_minify(pt->height0, dstLevel);
}
if (texObj->Target == GL_TEXTURE_2D_ARRAY) {
dstDepth = pt->array_size;
}
else {
dstDepth = u_minify(pt->depth0, dstLevel);
}
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 */
ctx->Driver.FreeTextureImageBuffer(ctx, dstImage);
/* initialize new image */
_mesa_init_teximage_fields(ctx, dstImage, dstWidth, dstHeight,
dstDepth, border, srcImage->InternalFormat,
srcImage->TexFormat);
stImage = st_texture_image(dstImage);
pipe_resource_reference(&stImage->pt, pt);
}
}