summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/i915tex/intel_pixel_read.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/drivers/dri/i915tex/intel_pixel_read.c')
-rw-r--r--src/mesa/drivers/dri/i915tex/intel_pixel_read.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i915tex/intel_pixel_read.c b/src/mesa/drivers/dri/i915tex/intel_pixel_read.c
new file mode 100644
index 0000000000..c1cc65674d
--- /dev/null
+++ b/src/mesa/drivers/dri/i915tex/intel_pixel_read.c
@@ -0,0 +1,317 @@
+/**************************************************************************
+ *
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "glheader.h"
+#include "enums.h"
+#include "mtypes.h"
+#include "macros.h"
+#include "image.h"
+#include "bufferobj.h"
+#include "swrast/swrast.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_ioctl.h"
+#include "intel_batchbuffer.h"
+#include "intel_blit.h"
+#include "intel_buffers.h"
+#include "intel_regions.h"
+#include "intel_pixel.h"
+#include "intel_buffer_objects.h"
+
+/* For many applications, the new ability to pull the source buffers
+ * back out of the GTT and then do the packing/conversion operations
+ * in software will be as much of an improvement as trying to get the
+ * blitter and/or texture engine to do the work.
+ *
+ * This step is gated on private backbuffers.
+ *
+ * Obviously the frontbuffer can't be pulled back, so that is either
+ * an argument for blit/texture readpixels, or for blitting to a
+ * temporary and then pulling that back.
+ *
+ * When the destination is a pbo, however, it's not clear if it is
+ * ever going to be pulled to main memory (though the access param
+ * will be a good hint). So it sounds like we do want to be able to
+ * choose between blit/texture implementation on the gpu and pullback
+ * and cpu-based copying.
+ *
+ * Unless you can magically turn client memory into a PBO for the
+ * duration of this call, there will be a cpu-based copying step in
+ * any case.
+ */
+
+
+static GLboolean
+do_texture_readpixels(GLcontext * ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *pack,
+ struct intel_region *dest_region)
+{
+#if 0
+ struct intel_context *intel = intel_context(ctx);
+ intelScreenPrivate *screen = intel->intelScreen;
+ GLint pitch = pack->RowLength ? pack->RowLength : width;
+ __DRIdrawablePrivate *dPriv = intel->driDrawable;
+ int textureFormat;
+ GLenum glTextureFormat;
+ int destFormat, depthFormat, destPitch;
+ drm_clip_rect_t tmp;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+
+ if (ctx->_ImageTransferState ||
+ pack->SwapBytes || pack->LsbFirst || !pack->Invert) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: check_color failed\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ intel->vtbl.meta_texrect_source(intel, intel_readbuf_region(intel));
+
+ if (!intel->vtbl.meta_render_dest(intel, dest_region, type, format)) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: couldn't set dest %s/%s\n",
+ __FUNCTION__,
+ _mesa_lookup_enum_by_nr(type),
+ _mesa_lookup_enum_by_nr(format));
+ return GL_FALSE;
+ }
+
+ LOCK_HARDWARE(intel);
+
+ if (intel->driDrawable->numClipRects) {
+ intel->vtbl.install_meta_state(intel);
+ intel->vtbl.meta_no_depth_write(intel);
+ intel->vtbl.meta_no_stencil_write(intel);
+
+ if (!driClipRectToFramebuffer(ctx->ReadBuffer, &x, &y, &width, &height)) {
+ UNLOCK_HARDWARE(intel);
+ SET_STATE(i830, state);
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: cliprect failed\n", __FUNCTION__);
+ return GL_TRUE;
+ }
+
+ y = dPriv->h - y - height;
+ x += dPriv->x;
+ y += dPriv->y;
+
+
+ /* Set the frontbuffer up as a large rectangular texture.
+ */
+ intel->vtbl.meta_tex_rect_source(intel, src_region, textureFormat);
+
+
+ intel->vtbl.meta_texture_blend_replace(i830, glTextureFormat);
+
+
+ /* Set the 3d engine to draw into the destination region:
+ */
+
+ intel->vtbl.meta_draw_region(intel, dest_region);
+ intel->vtbl.meta_draw_format(intel, destFormat, depthFormat); /* ?? */
+
+
+ /* Draw a single quad, no cliprects:
+ */
+ intel->vtbl.meta_disable_cliprects(intel);
+
+ intel->vtbl.draw_quad(intel,
+ 0, width, 0, height,
+ 0x00ff00ff, x, x + width, y, y + height);
+
+ intel->vtbl.leave_meta_state(intel);
+ }
+ UNLOCK_HARDWARE(intel);
+
+ intel_region_wait_fence(ctx, dest_region); /* required by GL */
+ return GL_TRUE;
+#endif
+
+ return GL_FALSE;
+}
+
+
+
+
+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;
+ struct _DriFenceObject *fence = NULL;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ _mesa_printf("%s\n", __FUNCTION__);
+
+ if (!src)
+ return GL_FALSE;
+
+ if (dst) {
+ /* XXX This validation should be done by core mesa:
+ */
+ if (!_mesa_validate_pbo_access(2, pack, 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 (ctx->_ImageTransferState ||
+ !intel_check_blit_format(src, format, type)) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ _mesa_printf("%s - bad format for blit\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ if (pack->Alignment != 1 || pack->SwapBytes || pack->LsbFirst) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ _mesa_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)
+ _mesa_printf("%s: MESA_PACK_INVERT not done yet\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+ else {
+ rowLength = -rowLength;
+ }
+
+ /* XXX 64-bit cast? */
+ dst_offset = (GLuint) _mesa_image_address(2, pack, pixels, width, height,
+ format, type, 0, 0, 0);
+
+
+ /* Although the blits go on the command buffer, need to do this and
+ * fire with lock held to guarentee cliprects are correct.
+ */
+ intelFlush(&intel->ctx);
+ LOCK_HARDWARE(intel);
+
+ if (intel->driDrawable->numClipRects) {
+ GLboolean all = (width * height * src->cpp == dst->Base.Size &&
+ x == 0 && dst_offset == 0);
+
+ struct _DriBufferObject *dst_buffer =
+ intel_bufferobj_buffer(intel, dst, all ? INTEL_WRITE_FULL :
+ INTEL_WRITE_PART);
+ __DRIdrawablePrivate *dPriv = intel->driDrawable;
+ int nbox = dPriv->numClipRects;
+ drm_clip_rect_t *box = dPriv->pClipRects;
+ drm_clip_rect_t rect;
+ drm_clip_rect_t src_rect;
+ int i;
+
+ src_rect.x1 = dPriv->x + x;
+ src_rect.y1 = dPriv->y + dPriv->h - (y + height);
+ src_rect.x2 = src_rect.x1 + width;
+ src_rect.y2 = src_rect.y1 + height;
+
+
+
+ for (i = 0; i < nbox; i++) {
+ if (!intel_intersect_cliprects(&rect, &src_rect, &box[i]))
+ continue;
+
+ intelEmitCopyBlit(intel,
+ src->cpp,
+ src->pitch, src->buffer, 0,
+ rowLength,
+ dst_buffer, dst_offset,
+ rect.x1,
+ rect.y1,
+ rect.x1 - src_rect.x1,
+ rect.y2 - src_rect.y2,
+ rect.x2 - rect.x1, rect.y2 - rect.y1);
+ }
+
+ fence = intel_batchbuffer_flush(intel->batch);
+ driFenceReference(fence);
+
+ }
+ UNLOCK_HARDWARE(intel);
+
+ if (intel->driDrawable->numClipRects)
+ 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;
+}
+
+void
+intelReadPixels(GLcontext * ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
+{
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ intelFlush(ctx);
+
+ if (do_blit_readpixels
+ (ctx, x, y, width, height, format, type, pack, pixels))
+ return;
+
+ if (do_texture_readpixels
+ (ctx, x, y, width, height, format, type, pack, pixels))
+ return;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
+
+ _swrast_ReadPixels(ctx, x, y, width, height, format, type, pack, pixels);
+}