r300g: add acceleration of the clear, surface_copy, and surface_fill functions

1 files changed, 130 insertions, 0 deletions

diff --git a/src/gallium/drivers/r300/r300_blit.c b/src/gallium/drivers/r300/r300_blit.c
new file mode 100644
index 00000000000..ffe066d5369
--- /dev/null
+++ b/src/gallium/drivers/r300/r300_blit.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2009 Marek Olšák <[email protected]>
+ *
+ * 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
+ * on 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
+ * THE AUTHOR(S) AND/OR THEIR 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 "r300_blit.h"
+#include "r300_context.h"
+
+#include "util/u_rect.h"
+
+static void r300_blitter_save_states(struct r300_context* r300)
+{
+    util_blitter_save_blend(r300->blitter, r300->blend_state);
+    util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state);
+    util_blitter_save_rasterizer(r300->blitter, r300->rs_state);
+    util_blitter_save_fragment_shader(r300->blitter, r300->fs);
+    util_blitter_save_vertex_shader(r300->blitter, r300->vs);
+}
+
+/* Clear currently bound buffers. */
+void r300_clear(struct pipe_context* pipe,
+                unsigned buffers,
+                const float* rgba,
+                double depth,
+                unsigned stencil)
+{
+    /* XXX Implement fastfill.
+     *
+     * If fastfill is enabled, a few facts should be considered:
+     *
+     * 1) Zbuffer must be micro-tiled and whole microtiles must be
+     *    written.
+     *
+     * 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
+     *    equal to 0.
+     *
+     * 3) RB3D_COLOR_CLEAR_VALUE is used to clear a colorbuffer and
+     *    RB3D_COLOR_CHANNEL_MASK must be equal to 0.
+     *
+     * 4) ZB_CB_CLEAR can be used to make the ZB units help in clearing
+     *    the colorbuffer. The color clear value is supplied through both
+     *    RB3D_COLOR_CLEAR_VALUE and ZB_DEPTHCLEARVALUE, and the colorbuffer
+     *    must be set in ZB_DEPTHOFFSET and ZB_DEPTHPITCH in addition to
+     *    RB3D_COLOROFFSET and RB3D_COLORPITCH. It's obvious that the zbuffer
+     *    will not be cleared and multiple render targets cannot be cleared
+     *    this way either.
+     *
+     * 5) For 16-bit integer buffering, compression causes a hung with one or
+     *    two samples and should not be used.
+     *
+     * 6) Fastfill must not be used if reading of compressed Z data is disabled
+     *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
+     *    i.e. it cannot be used to compress the zbuffer.
+     *    (what the hell does that mean and how does it fit in clearing
+     *    the buffers?)
+     *
+     * - Marek
+     */
+
+    struct r300_context* r300 = r300_context(pipe);
+
+    r300_blitter_save_states(r300);
+
+    util_blitter_clear(r300->blitter,
+                       r300->framebuffer_state.width,
+                       r300->framebuffer_state.height,
+                       r300->framebuffer_state.nr_cbufs,
+                       buffers, rgba, depth, stencil);
+}
+
+/* Copy a block of pixels from one surface to another. */
+void r300_surface_copy(struct pipe_context* pipe,
+                       struct pipe_surface* dst,
+                       unsigned dstx, unsigned dsty,
+                       struct pipe_surface* src,
+                       unsigned srcx, unsigned srcy,
+                       unsigned width, unsigned height)
+{
+    struct r300_context* r300 = r300_context(pipe);
+
+    /* Yeah we have to save all those states to ensure this blitter operation
+     * is really transparent. The states will be restored by the blitter once
+     * copying is done. */
+    r300_blitter_save_states(r300);
+    util_blitter_save_framebuffer(r300->blitter, &r300->framebuffer_state);
+
+    util_blitter_save_fragment_sampler_states(
+        r300->blitter, r300->sampler_count, (void**)r300->sampler_states);
+
+    util_blitter_save_fragment_sampler_textures(
+        r300->blitter, r300->texture_count,
+        (struct pipe_texture**)r300->textures);
+
+    /* Do a copy */
+    util_blitter_copy(r300->blitter,
+                      dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
+}
+
+/* Fill a region of a surface with a constant value. */
+void r300_surface_fill(struct pipe_context* pipe,
+                       struct pipe_surface* dst,
+                       unsigned dstx, unsigned dsty,
+                       unsigned width, unsigned height,
+                       unsigned value)
+{
+    struct r300_context* r300 = r300_context(pipe);
+
+    r300_blitter_save_states(r300);
+    util_blitter_save_framebuffer(r300->blitter, &r300->framebuffer_state);
+
+    util_blitter_fill(r300->blitter,
+                      dst, dstx, dsty, width, height, value);
+}