/**
* Need to map texture image into memory before copying image data,
* then unmap it.
*/
static void
intel_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
GLenum format, GLenum type, GLvoid * pixels,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage, int compressed)
{
struct intel_context *intel = intel_context(ctx);
struct intel_texture_image *intelImage = intel_texture_image(texImage);
/* Map */
if (intelImage->mt) {
/* Image is stored in hardware format in a buffer managed by the
* kernel. Need to explicitly map and unmap it.
*/
intelImage->base.Data =
intel_miptree_image_map(intel,
intelImage->mt,
intelImage->face,
intelImage->level,
&intelImage->base.RowStride,
intelImage->base.ImageOffsets);
intelImage->base.RowStride /= intelImage->mt->cpp;
}
else {
/* Otherwise, the image should actually be stored in
* intelImage->base.Data. This is pretty confusing for
* everybody, I'd much prefer to separate the two functions of
* texImage->Data - storage for texture images in main memory
* and access (ie mappings) of images. In other words, we'd
* create a new texImage->Map field and leave Data simply for
* storage.
*/
assert(intelImage->base.Data);
}
if (compressed) {
_mesa_get_compressed_teximage(ctx, target, level, pixels,
texObj, texImage);
} else {
_mesa_get_teximage(ctx, target, level, format, type, pixels,
texObj, texImage);
}
/* Unmap */
if (intelImage->mt) {
intel_miptree_image_unmap(intel, intelImage->mt);
intelImage->base.Data = NULL;
}
}
/**
* Called via ctx->Driver.GetTexImage()
*/
static void
st_GetTexImage(struct gl_context * ctx,
GLenum format, GLenum type, GLvoid * pixels,
struct gl_texture_image *texImage)
{
struct st_texture_image *stImage = st_texture_image(texImage);
if (stImage->pt && util_format_is_s3tc(stImage->pt->format)) {
/* Need to decompress the texture.
* We'll do this by rendering a textured quad (which is hopefully
* faster than using the fallback code in texcompress.c).
* Note that we only expect RGBA formats (no Z/depth formats).
*/
decompress_with_blit(ctx, format, type, pixels, texImage);
}
else {
_mesa_get_teximage(ctx, format, type, pixels, texImage);
}
}
