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-rw-r--r--src/mesa/state_tracker/st_gen_mipmap.c102
1 files changed, 24 insertions, 78 deletions
diff --git a/src/mesa/state_tracker/st_gen_mipmap.c b/src/mesa/state_tracker/st_gen_mipmap.c
index c4b3492b0d3..a14bbfabaa3 100644
--- a/src/mesa/state_tracker/st_gen_mipmap.c
+++ b/src/mesa/state_tracker/st_gen_mipmap.c
@@ -82,7 +82,6 @@ st_generate_mipmap(struct gl_context *ctx, GLenum target,
const uint baseLevel = texObj->BaseLevel;
enum pipe_format format;
uint lastLevel, first_layer, last_layer;
- uint dstLevel;
if (!pt)
return;
@@ -103,42 +102,33 @@ st_generate_mipmap(struct gl_context *ctx, GLenum target,
stObj->lastLevel = lastLevel;
if (!texObj->Immutable) {
- 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,
- 0,
- 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);
- st_texture_release_all_sampler_views(st, stObj);
- }
- else {
- /* Make sure that the base texture image data is present in the
- * texture buffer.
- */
- st_finalize_texture(ctx, st->pipe, texObj);
- }
+ const GLboolean genSave = texObj->GenerateMipmap;
+
+ /* Temporarily set GenerateMipmap to true so that allocate_full_mipmap()
+ * makes the right decision about full mipmap allocation.
+ */
+ texObj->GenerateMipmap = GL_TRUE;
+
+ _mesa_prepare_mipmap_levels(ctx, texObj, baseLevel, lastLevel);
+
+ texObj->GenerateMipmap = genSave;
+
+ /* At this point, memory for all the texture levels has been
+ * allocated. However, the base level image may be in one resource
+ * while the subsequent/smaller levels may be in another resource.
+ * Finalizing the texture will copy the base images from the former
+ * resource to the latter.
+ *
+ * After this, we'll have all mipmap levels in one resource.
+ */
+ st_finalize_texture(ctx, st->pipe, texObj);
}
pt = stObj->pt;
+ if (!pt) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "mipmap generation");
+ return;
+ }
assert(pt->last_level >= lastLevel);
@@ -169,48 +159,4 @@ st_generate_mipmap(struct gl_context *ctx, GLenum target,
_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 ||
- texObj->Target == GL_TEXTURE_CUBE_MAP_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);
- }
}