static GLboolean
do_blit_readpixels(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
{
struct intel_context *intel = intel_context(ctx);
struct intel_region *src = intel_readbuf_region(intel);
struct intel_buffer_object *dst = intel_buffer_object(pack->BufferObj);
GLuint dst_offset;
GLuint rowLength;
drm_intel_bo *dst_buffer;
GLboolean all;
GLint dst_x, dst_y;
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s\n", __FUNCTION__);
if (!src)
return GL_FALSE;
if (!_mesa_is_bufferobj(pack->BufferObj)) {
/* PBO only for now:
*/
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s - not PBO\n", __FUNCTION__);
return GL_FALSE;
}
if (ctx->_ImageTransferState ||
!intel_check_blit_format(src, format, type)) {
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s - bad format for blit\n", __FUNCTION__);
return GL_FALSE;
}
if (pack->Alignment != 1 || pack->SwapBytes || pack->LsbFirst) {
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s: bad packing params\n", __FUNCTION__);
return GL_FALSE;
}
if (pack->RowLength > 0)
rowLength = pack->RowLength;
else
rowLength = width;
if (pack->Invert) {
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s: MESA_PACK_INVERT not done yet\n", __FUNCTION__);
return GL_FALSE;
}
else {
if (ctx->ReadBuffer->Name == 0)
rowLength = -rowLength;
}
dst_offset = (GLintptr) _mesa_image_address(2, pack, pixels, width, height,
format, type, 0, 0, 0);
if (!_mesa_clip_copytexsubimage(ctx,
&dst_x, &dst_y,
&x, &y,
&width, &height)) {
return GL_TRUE;
}
intel_prepare_render(intel);
all = (width * height * src->cpp == dst->Base.Size &&
x == 0 && dst_offset == 0);
dst_x = 0;
dst_y = 0;
dst_buffer = intel_bufferobj_buffer(intel, dst,
all ? INTEL_WRITE_FULL :
INTEL_WRITE_PART);
if (ctx->ReadBuffer->Name == 0)
y = ctx->ReadBuffer->Height - (y + height);
if (!intelEmitCopyBlit(intel,
src->cpp,
src->pitch, src->buffer, 0, src->tiling,
rowLength, dst_buffer, dst_offset, GL_FALSE,
x, y,
dst_x, dst_y,
width, height,
GL_COPY)) {
return GL_FALSE;
}
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s - DONE\n", __FUNCTION__);
return GL_TRUE;
}
/* Pros:
* - no waiting for idle before updating framebuffer.
*
* Cons:
* - if upload is by memcpy, this may actually be slower than fallback path.
* - uploads the whole image even if destination is clipped
*
* Need to benchmark.
*
* Given the questions about performance, implement for pbo's only.
* This path is definitely a win if the pbo is already in agp. If it
* turns out otherwise, we can add the code necessary to upload client
* data to agp space before performing the blit. (Though it may turn
* out to be better/simpler just to use the texture engine).
*/
static GLboolean
do_blit_drawpixels(GLcontext * ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid * pixels)
{
struct intel_context *intel = intel_context(ctx);
struct intel_region *dest = intel_drawbuf_region(intel);
struct intel_buffer_object *src = intel_buffer_object(unpack->BufferObj);
GLuint src_offset;
GLuint rowLength;
struct _DriFenceObject *fence = NULL;
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s\n", __FUNCTION__);
if (!dest) {
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - no dest\n", __FUNCTION__);
return GL_FALSE;
}
if (src) {
/* This validation should be done by core mesa:
*/
if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
format, type, pixels)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels");
return GL_TRUE;
}
}
else {
/* PBO only for now:
*/
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - not PBO\n", __FUNCTION__);
return GL_FALSE;
}
if (!intel_check_blit_format(dest, format, type)) {
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - bad format for blit\n", __FUNCTION__);
return GL_FALSE;
}
if (!intel_check_blit_fragment_ops(ctx)) {
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - bad GL fragment state for blitter\n",
__FUNCTION__);
return GL_FALSE;
}
if (ctx->Pixel.ZoomX != 1.0F) {
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - bad PixelZoomX for blit\n", __FUNCTION__);
return GL_FALSE;
}
if (unpack->RowLength > 0)
rowLength = unpack->RowLength;
else
rowLength = width;
if (ctx->Pixel.ZoomY == -1.0F) {
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - bad PixelZoomY for blit\n", __FUNCTION__);
return GL_FALSE; /* later */
y -= height;
}
else if (ctx->Pixel.ZoomY == 1.0F) {
rowLength = -rowLength;
}
else {
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - bad PixelZoomY for blit\n", __FUNCTION__);
return GL_FALSE;
}
src_offset = (GLuint) _mesa_image_address(2, unpack, pixels, width, height,
format, type, 0, 0, 0);
intelFlush(&intel->ctx);
LOCK_HARDWARE(intel);
if (intel->driDrawable->numClipRects) {
__DRIdrawablePrivate *dPriv = intel->driDrawable;
int nbox = dPriv->numClipRects;
drm_clip_rect_t *box = dPriv->pClipRects;
drm_clip_rect_t rect;
drm_clip_rect_t dest_rect;
struct _DriBufferObject *src_buffer =
intel_bufferobj_buffer(intel, src, INTEL_READ);
int i;
dest_rect.x1 = dPriv->x + x;
dest_rect.y1 = dPriv->y + dPriv->h - (y + height);
dest_rect.x2 = dest_rect.x1 + width;
dest_rect.y2 = dest_rect.y1 + height;
for (i = 0; i < nbox; i++) {
if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
continue;
intelEmitCopyBlit(intel,
dest->cpp,
rowLength,
src_buffer, src_offset,
dest->pitch,
dest->buffer, 0,
rect.x1 - dest_rect.x1,
rect.y2 - dest_rect.y2,
rect.x1,
rect.y1, rect.x2 - rect.x1, rect.y2 - rect.y1,
ctx->Color.ColorLogicOpEnabled ?
ctx->Color.LogicOp : GL_COPY);
}
fence = intel_batchbuffer_flush(intel->batch);
driFenceReference(fence);
}
UNLOCK_HARDWARE(intel);
if (fence) {
driFenceFinish(fence, DRM_FENCE_TYPE_EXE | DRM_I915_FENCE_TYPE_RW, GL_FALSE);
driFenceUnReference(fence);
}
if (INTEL_DEBUG & DEBUG_PIXEL)
_mesa_printf("%s - DONE\n", __FUNCTION__);
return GL_TRUE;
}