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authorJakob Bornecrantz <jakob@vmware.com>2009-06-30 07:33:54 +0200
committerJakob Bornecrantz <jakob@vmware.com>2009-06-30 14:11:45 +0200
commita4fd94a54a75a3418462c30f1240ab50b5f24090 (patch)
tree8e2364ff0fb77899d53c1064cb11d0b33dff6e1a
parentba7f45ac0ca3debb2a250d5e945a2d70b2b72d08 (diff)
st/gl: Add support for glCompressedTexSubImage
-rw-r--r--src/mesa/state_tracker/st_cb_texture.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 14b78d1253..5845b7940c 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -1169,6 +1169,63 @@ st_TexSubImage1D(GLcontext *ctx, GLenum target, GLint level,
}
+static void
+st_CompressedTexSubImage2D(GLcontext *ctx, GLenum target, GLint level,
+ GLint xoffset, GLint yoffset,
+ GLsizei width, GLint height,
+ GLenum format,
+ GLsizei imageSize, const GLvoid *data,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ struct st_texture_image *stImage = st_texture_image(texImage);
+ struct pipe_format_block block;
+ int srcBlockStride;
+ int dstBlockStride;
+ int y;
+
+ if (stImage->pt) {
+ st_teximage_flush_before_map(ctx->st, stImage->pt, 0, level,
+ PIPE_TRANSFER_WRITE);
+ texImage->Data = st_texture_image_map(ctx->st, stImage, 0,
+ PIPE_TRANSFER_WRITE,
+ xoffset, yoffset,
+ width, height);
+
+ block = stImage->pt->block;
+ srcBlockStride = pf_get_stride(&block, width);
+ dstBlockStride = stImage->transfer->stride;
+ } else {
+ assert(stImage->pt);
+ /* TODO find good values for block and strides */
+ /* TODO also adjust texImage->data for yoffset/xoffset */
+ return;
+ }
+
+ if (!texImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexSubImage");
+ return;
+ }
+
+ assert(xoffset % block.width == 0);
+ assert(yoffset % block.height == 0);
+ assert(width % block.width == 0);
+ assert(height % block.height == 0);
+
+ for (y = 0; y < height; y += block.height) {
+ /* don't need to adjust for xoffset and yoffset as st_texture_image_map does that */
+ const char *src = (const char*)data + srcBlockStride * pf_get_nblocksy(&block, y);
+ char *dst = (char*)texImage->Data + dstBlockStride * pf_get_nblocksy(&block, y);
+ memcpy(dst, src, pf_get_stride(&block, width));
+ }
+
+ if (stImage->pt) {
+ st_texture_image_unmap(ctx->st, stImage);
+ texImage->Data = NULL;
+ }
+}
+
+
/**
* Do a CopyTexSubImage operation using a read transfer from the source,
@@ -1818,6 +1875,7 @@ st_init_texture_functions(struct dd_function_table *functions)
functions->TexSubImage1D = st_TexSubImage1D;
functions->TexSubImage2D = st_TexSubImage2D;
functions->TexSubImage3D = st_TexSubImage3D;
+ functions->CompressedTexSubImage2D = st_CompressedTexSubImage2D;
functions->CopyTexImage1D = st_CopyTexImage1D;
functions->CopyTexImage2D = st_CopyTexImage2D;
functions->CopyTexSubImage1D = st_CopyTexSubImage1D;