r300g/swtcl: don't enter u_vbuf_mgr
[mesa.git] / src / gallium / drivers / r300 / r300_blit.c
index 5489d880b18f57283226bc18c4346e305d623100..920612b8de56fc52979217298b417c0cca1d57a3 100644 (file)
  * 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 "r300_emit.h"
 #include "r300_texture.h"
 
 #include "util/u_format.h"
+#include "util/u_pack_color.h"
+#include "util/u_surface.h"
 
-static void r300_blitter_save_states(struct r300_context* r300)
+enum r300_blitter_op /* bitmask */
 {
+    R300_STOP_QUERY         = 1,
+    R300_SAVE_TEXTURES      = 2,
+    R300_SAVE_FRAMEBUFFER   = 4,
+    R300_IGNORE_RENDER_COND = 8,
+
+    R300_CLEAR         = R300_STOP_QUERY,
+
+    R300_CLEAR_SURFACE = R300_STOP_QUERY | R300_SAVE_FRAMEBUFFER,
+
+    R300_COPY          = R300_STOP_QUERY | R300_SAVE_FRAMEBUFFER |
+                         R300_SAVE_TEXTURES | R300_IGNORE_RENDER_COND,
+
+    R300_DECOMPRESS    = R300_STOP_QUERY | R300_IGNORE_RENDER_COND,
+};
+
+static void r300_blitter_begin(struct r300_context* r300, enum r300_blitter_op op)
+{
+    if ((op & R300_STOP_QUERY) && r300->query_current) {
+        r300->blitter_saved_query = r300->query_current;
+        r300_stop_query(r300);
+    }
+
+    /* Yeah we have to save all those states to ensure the blitter operation
+     * is really transparent. The states will be restored by the blitter once
+     * copying is done. */
     util_blitter_save_blend(r300->blitter, r300->blend_state.state);
     util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state.state);
     util_blitter_save_stencil_ref(r300->blitter, &(r300->stencil_ref));
@@ -35,188 +62,539 @@ static void r300_blitter_save_states(struct r300_context* r300)
     util_blitter_save_fragment_shader(r300->blitter, r300->fs.state);
     util_blitter_save_vertex_shader(r300->blitter, r300->vs_state.state);
     util_blitter_save_viewport(r300->blitter, &r300->viewport);
-    util_blitter_save_clip(r300->blitter, &r300->clip);
     util_blitter_save_vertex_elements(r300->blitter, r300->velems);
-    /* XXX this crashes the driver
-    util_blitter_save_vertex_buffers(r300->blitter, r300->vertex_buffer_count,
-                                     r300->vertex_buffer); */
+    if (r300->vbuf_mgr) {
+        util_blitter_save_vertex_buffers(r300->blitter, r300->vbuf_mgr->nr_vertex_buffers,
+                                         r300->vbuf_mgr->vertex_buffer);
+    } else {
+        util_blitter_save_vertex_buffers(r300->blitter, r300->swtcl_nr_vertex_buffers,
+                                         r300->swtcl_vertex_buffer);
+    }
+
+    if (op & R300_SAVE_FRAMEBUFFER) {
+        util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
+    }
+
+    if (op & R300_SAVE_TEXTURES) {
+        struct r300_textures_state* state =
+            (struct r300_textures_state*)r300->textures_state.state;
+
+        util_blitter_save_fragment_sampler_states(
+            r300->blitter, state->sampler_state_count,
+            (void**)state->sampler_states);
+
+        util_blitter_save_fragment_sampler_views(
+            r300->blitter, state->sampler_view_count,
+            (struct pipe_sampler_view**)state->sampler_views);
+    }
+
+    if (op & R300_IGNORE_RENDER_COND) {
+        /* Save the flag. */
+        r300->blitter_saved_skip_rendering = r300->skip_rendering+1;
+        r300->skip_rendering = FALSE;
+    } else {
+        r300->blitter_saved_skip_rendering = 0;
+    }
+}
+
+static void r300_blitter_end(struct r300_context *r300)
+{
+    if (r300->blitter_saved_query) {
+        r300_resume_query(r300, r300->blitter_saved_query);
+        r300->blitter_saved_query = NULL;
+    }
+
+    if (r300->blitter_saved_skip_rendering) {
+        /* Restore the flag. */
+        r300->skip_rendering = r300->blitter_saved_skip_rendering-1;
+    }
+}
+
+static uint32_t r300_depth_clear_cb_value(enum pipe_format format,
+                                          const float* rgba)
+{
+    union util_color uc;
+    util_pack_color(rgba, format, &uc);
+
+    if (util_format_get_blocksizebits(format) == 32)
+        return uc.ui;
+    else
+        return uc.us | (uc.us << 16);
+}
+
+static boolean r300_cbzb_clear_allowed(struct r300_context *r300,
+                                       unsigned clear_buffers)
+{
+    struct pipe_framebuffer_state *fb =
+        (struct pipe_framebuffer_state*)r300->fb_state.state;
+
+    /* Only color clear allowed, and only one colorbuffer. */
+    if (clear_buffers != PIPE_CLEAR_COLOR || fb->nr_cbufs != 1)
+        return FALSE;
+
+    return r300_surface(fb->cbufs[0])->cbzb_allowed;
+}
+
+static boolean r300_fast_zclear_allowed(struct r300_context *r300)
+{
+    struct pipe_framebuffer_state *fb =
+        (struct pipe_framebuffer_state*)r300->fb_state.state;
+
+    return r300_resource(fb->zsbuf->texture)->tex.zmask_dwords[fb->zsbuf->u.tex.level] != 0;
+}
+
+static boolean r300_hiz_clear_allowed(struct r300_context *r300)
+{
+    struct pipe_framebuffer_state *fb =
+        (struct pipe_framebuffer_state*)r300->fb_state.state;
+
+    return r300_resource(fb->zsbuf->texture)->tex.hiz_dwords[fb->zsbuf->u.tex.level] != 0;
+}
+
+static uint32_t r300_depth_clear_value(enum pipe_format format,
+                                       double depth, unsigned stencil)
+{
+    switch (format) {
+        case PIPE_FORMAT_Z16_UNORM:
+        case PIPE_FORMAT_X8Z24_UNORM:
+            return util_pack_z(format, depth);
+
+        case PIPE_FORMAT_S8_UINT_Z24_UNORM:
+            return util_pack_z_stencil(format, depth, stencil);
+
+        default:
+            assert(0);
+            return 0;
+    }
+}
+
+static uint32_t r300_hiz_clear_value(double depth)
+{
+    uint32_t r = (uint32_t)(CLAMP(depth, 0, 1) * 255.5);
+    assert(r <= 255);
+    return r | (r << 8) | (r << 16) | (r << 24);
 }
 
 /* Clear currently bound buffers. */
-void r300_clear(struct pipe_context* pipe,
-                unsigned buffers,
-                const float* rgba,
-                double depth,
-                unsigned stencil)
+static void r300_clear(struct pipe_context* pipe,
+                       unsigned buffers,
+                       const union pipe_color_union *color,
+                       double depth,
+                       unsigned stencil)
 {
-    /* XXX Implement fastfill.
+    /* My notes about Zbuffer compression:
+     *
+     * 1) The zbuffer must be micro-tiled and whole microtiles must be
+     *    written if compression is enabled. If microtiling is disabled,
+     *    it locks up.
      *
-     * If fastfill is enabled, a few facts should be considered:
+     * 2) There is ZMASK RAM which contains a compressed zbuffer.
+     *    Each dword of the Z Mask contains compression information
+     *    for 16 4x4 pixel tiles, that is 2 bits for each tile.
+     *    On chips with 2 Z pipes, every other dword maps to a different
+     *    pipe. On newer chipsets, there is a new compression mode
+     *    with 8x8 pixel tiles per 2 bits.
      *
-     * 1) Zbuffer must be micro-tiled and whole microtiles must be
-     *    written.
+     * 3) The FASTFILL bit has nothing to do with filling. It only tells hw
+     *    it should look in the ZMASK RAM first before fetching from a real
+     *    zbuffer.
      *
-     * 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
-     *    equal to 0.
+     * 4) If a pixel is in a cleared state, ZB_DEPTHCLEARVALUE is returned
+     *    during zbuffer reads instead of the value that is actually stored
+     *    in the zbuffer memory. A pixel is in a cleared state when its ZMASK
+     *    is equal to 0. Therefore, if you clear ZMASK with zeros, you may
+     *    leave the zbuffer memory uninitialized, but then you must enable
+     *    compression, so that the ZMASK RAM is actually used.
      *
-     * 3) For 16-bit integer buffering, compression causes a hung with one or
+     * 5) Each 4x4 (or 8x8) tile is automatically decompressed and recompressed
+     *    during zbuffer updates. A special decompressing operation should be
+     *    used to fully decompress a zbuffer, which basically just stores all
+     *    compressed tiles in ZMASK to the zbuffer memory.
+     *
+     * 6) For a 16-bit zbuffer, compression causes a hung with one or
      *    two samples and should not be used.
      *
-     * 4) Fastfill must not be used if reading of compressed Z data is disabled
+     * 7) FORCE_COMPRESSED_STENCIL_VALUE should be enabled for stencil clears
+     *    to avoid needless decompression.
+     *
+     * 8) 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?)
+     *
+     * 9) ZB_CB_CLEAR does not interact with zbuffer compression in any way.
      *
      * - Marek
      */
 
     struct r300_context* r300 = r300_context(pipe);
-    struct pipe_framebuffer_state* fb =
+    struct pipe_framebuffer_state *fb =
+        (struct pipe_framebuffer_state*)r300->fb_state.state;
+    struct r300_hyperz_state *hyperz =
+        (struct r300_hyperz_state*)r300->hyperz_state.state;
+    uint32_t width = fb->width;
+    uint32_t height = fb->height;
+    uint32_t hyperz_dcv = hyperz->zb_depthclearvalue;
+
+    /* Enable fast Z clear.
+     * The zbuffer must be in micro-tiled mode, otherwise it locks up. */
+    if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
+        boolean zmask_clear, hiz_clear;
+
+        zmask_clear = r300_fast_zclear_allowed(r300);
+        hiz_clear = r300_hiz_clear_allowed(r300);
+
+        /* If we need Hyper-Z. */
+        if (zmask_clear || hiz_clear) {
+            r300->num_z_clears++;
+
+            /* Try to obtain the access to Hyper-Z buffers if we don't have one. */
+            if (!r300->hyperz_enabled) {
+                r300->hyperz_enabled =
+                    r300->rws->cs_request_feature(r300->cs,
+                                                RADEON_FID_R300_HYPERZ_ACCESS,
+                                                TRUE);
+                if (r300->hyperz_enabled) {
+                   /* Need to emit HyperZ buffer regs for the first time. */
+                   r300_mark_fb_state_dirty(r300, R300_CHANGED_HYPERZ_FLAG);
+                }
+            }
+
+            /* Setup Hyper-Z clears. */
+            if (r300->hyperz_enabled) {
+                DBG(r300, DBG_HYPERZ, "r300: Clear memory: %s%s\n",
+                    zmask_clear ? "ZMASK " : "", hiz_clear ? "HIZ" : "");
+
+                if (zmask_clear) {
+                    hyperz_dcv = hyperz->zb_depthclearvalue =
+                        r300_depth_clear_value(fb->zsbuf->format, depth, stencil);
+
+                    r300_mark_atom_dirty(r300, &r300->zmask_clear);
+                    buffers &= ~PIPE_CLEAR_DEPTHSTENCIL;
+                }
+
+                if (hiz_clear) {
+                    r300->hiz_clear_value = r300_hiz_clear_value(depth);
+                    r300_mark_atom_dirty(r300, &r300->hiz_clear);
+                }
+            }
+        }
+    }
+
+    /* Enable CBZB clear. */
+    if (r300_cbzb_clear_allowed(r300, buffers)) {
+        struct r300_surface *surf = r300_surface(fb->cbufs[0]);
+
+        hyperz->zb_depthclearvalue =
+                r300_depth_clear_cb_value(surf->base.format, color->f);
+
+        width = surf->cbzb_width;
+        height = surf->cbzb_height;
+
+        r300->cbzb_clear = TRUE;
+        r300_mark_fb_state_dirty(r300, R300_CHANGED_HYPERZ_FLAG);
+    }
+
+    /* Clear. */
+    if (buffers) {
+        enum pipe_format cformat = fb->nr_cbufs ? fb->cbufs[0]->format : PIPE_FORMAT_NONE;
+        /* Clear using the blitter. */
+        r300_blitter_begin(r300, R300_CLEAR);
+        util_blitter_clear(r300->blitter,
+                           width,
+                           height,
+                           fb->nr_cbufs,
+                           buffers, cformat, color, depth, stencil);
+        r300_blitter_end(r300);
+    } else if (r300->zmask_clear.dirty || r300->hiz_clear.dirty) {
+        /* Just clear zmask and hiz now, this does not use the standard draw
+         * procedure. */
+        /* Calculate zmask_clear and hiz_clear atom sizes. */
+        unsigned dwords =
+            (r300->zmask_clear.dirty ? r300->zmask_clear.size : 0) +
+            (r300->hiz_clear.dirty ? r300->hiz_clear.size : 0) +
+            r300_get_num_cs_end_dwords(r300);
+
+        /* Reserve CS space. */
+        if (dwords > (RADEON_MAX_CMDBUF_DWORDS - r300->cs->cdw)) {
+            r300_flush(&r300->context, RADEON_FLUSH_ASYNC, NULL);
+        }
+
+        /* Emit clear packets. */
+        if (r300->zmask_clear.dirty) {
+            r300_emit_zmask_clear(r300, r300->zmask_clear.size,
+                                  r300->zmask_clear.state);
+            r300->zmask_clear.dirty = FALSE;
+        }
+        if (r300->hiz_clear.dirty) {
+            r300_emit_hiz_clear(r300, r300->hiz_clear.size,
+                                r300->hiz_clear.state);
+            r300->hiz_clear.dirty = FALSE;
+        }
+    } else {
+        assert(0);
+    }
+
+    /* Disable CBZB clear. */
+    if (r300->cbzb_clear) {
+        r300->cbzb_clear = FALSE;
+        hyperz->zb_depthclearvalue = hyperz_dcv;
+        r300_mark_fb_state_dirty(r300, R300_CHANGED_HYPERZ_FLAG);
+    }
+
+    /* Enable fastfill and/or hiz.
+     *
+     * If we cleared zmask/hiz, it's in use now. The Hyper-Z state update
+     * looks if zmask/hiz is in use and programs hardware accordingly. */
+    if (r300->zmask_in_use || r300->hiz_in_use) {
+        r300_mark_atom_dirty(r300, &r300->hyperz_state);
+    }
+}
+
+/* Clear a region of a color surface to a constant value. */
+static void r300_clear_render_target(struct pipe_context *pipe,
+                                     struct pipe_surface *dst,
+                                     const union pipe_color_union *color,
+                                     unsigned dstx, unsigned dsty,
+                                     unsigned width, unsigned height)
+{
+    struct r300_context *r300 = r300_context(pipe);
+
+    r300_blitter_begin(r300, R300_CLEAR_SURFACE);
+    util_blitter_clear_render_target(r300->blitter, dst, color,
+                                     dstx, dsty, width, height);
+    r300_blitter_end(r300);
+}
+
+/* Clear a region of a depth stencil surface. */
+static void r300_clear_depth_stencil(struct pipe_context *pipe,
+                                     struct pipe_surface *dst,
+                                     unsigned clear_flags,
+                                     double depth,
+                                     unsigned stencil,
+                                     unsigned dstx, unsigned dsty,
+                                     unsigned width, unsigned height)
+{
+    struct r300_context *r300 = r300_context(pipe);
+    struct pipe_framebuffer_state *fb =
         (struct pipe_framebuffer_state*)r300->fb_state.state;
 
-    r300_blitter_save_states(r300);
+    if (r300->zmask_in_use && !r300->locked_zbuffer) {
+        if (fb->zsbuf->texture == dst->texture) {
+            r300_decompress_zmask(r300);
+        }
+    }
 
-    util_blitter_clear(r300->blitter,
-                       fb->width,
-                       fb->height,
-                       fb->nr_cbufs,
-                       buffers, rgba, depth, stencil);
+    /* XXX Do not decompress ZMask of the currently-set zbuffer. */
+    r300_blitter_begin(r300, R300_CLEAR_SURFACE);
+    util_blitter_clear_depth_stencil(r300->blitter, dst, clear_flags, depth, stencil,
+                                     dstx, dsty, width, height);
+    r300_blitter_end(r300);
 }
 
-/* Copy a block of pixels from one surface to another using HW. */
-static void r300_hw_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)
+void r300_decompress_zmask(struct r300_context *r300)
 {
-    struct r300_context* r300 = r300_context(pipe);
-    struct r300_textures_state* state =
-        (struct r300_textures_state*)r300->textures_state.state;
+    struct pipe_framebuffer_state *fb =
+        (struct pipe_framebuffer_state*)r300->fb_state.state;
 
-    /* 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->fb_state.state);
+    if (!r300->zmask_in_use || r300->locked_zbuffer)
+        return;
 
-    util_blitter_save_fragment_sampler_states(
-        r300->blitter, state->sampler_state_count,
-        (void**)state->sampler_states);
+    r300->zmask_decompress = TRUE;
+    r300_mark_atom_dirty(r300, &r300->hyperz_state);
 
-    util_blitter_save_fragment_sampler_views(
-        r300->blitter, state->sampler_view_count,
-        (struct pipe_sampler_view**)state->sampler_views);
+    r300_blitter_begin(r300, R300_DECOMPRESS);
+    util_blitter_clear_depth_custom(r300->blitter, fb->width, fb->height, 0,
+                                    r300->dsa_decompress_zmask);
+    r300_blitter_end(r300);
 
-    /* Do a copy */
-    util_blitter_copy(r300->blitter,
-                      dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
+    r300->zmask_decompress = FALSE;
+    r300->zmask_in_use = FALSE;
+    r300_mark_atom_dirty(r300, &r300->hyperz_state);
+}
+
+void r300_decompress_zmask_locked_unsafe(struct r300_context *r300)
+{
+    struct pipe_framebuffer_state fb;
+
+    memset(&fb, 0, sizeof(fb));
+    fb.width = r300->locked_zbuffer->width;
+    fb.height = r300->locked_zbuffer->height;
+    fb.zsbuf = r300->locked_zbuffer;
+
+    r300->context.set_framebuffer_state(&r300->context, &fb);
+    r300_decompress_zmask(r300);
+}
+
+void r300_decompress_zmask_locked(struct r300_context *r300)
+{
+    struct pipe_framebuffer_state saved_fb;
+
+    memset(&saved_fb, 0, sizeof(saved_fb));
+    util_copy_framebuffer_state(&saved_fb, r300->fb_state.state);
+    r300_decompress_zmask_locked_unsafe(r300);
+    r300->context.set_framebuffer_state(&r300->context, &saved_fb);
+    util_unreference_framebuffer_state(&saved_fb);
+
+    pipe_surface_reference(&r300->locked_zbuffer, NULL);
+}
+
+bool r300_is_blit_supported(enum pipe_format format)
+{
+    const struct util_format_description *desc =
+        util_format_description(format);
+
+    return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ||
+           desc->layout == UTIL_FORMAT_LAYOUT_S3TC ||
+           desc->layout == UTIL_FORMAT_LAYOUT_RGTC;
 }
 
 /* Copy a block of pixels from one surface to another. */
-void r300_surface_copy(struct pipe_context* pipe,
-                       struct pipe_resource* dst,
-                       struct pipe_subresource subdst,
-                       unsigned dstx, unsigned dsty, unsigned dstz,
-                       struct pipe_resource* src,
-                       struct pipe_subresource subsrc,
-                       unsigned srcx, unsigned srcy, unsigned srcz,
-                       unsigned width, unsigned height)
+static void r300_resource_copy_region(struct pipe_context *pipe,
+                                      struct pipe_resource *dst,
+                                      unsigned dst_level,
+                                      unsigned dstx, unsigned dsty, unsigned dstz,
+                                      struct pipe_resource *src,
+                                      unsigned src_level,
+                                      const struct pipe_box *src_box)
 {
     struct pipe_screen *screen = pipe->screen;
-    enum pipe_format old_format = dst->format;
-    enum pipe_format new_format = old_format;
-    struct pipe_surface *srcsurf, *dstsurf;
-    unsigned bind;
+    struct r300_context *r300 = r300_context(pipe);
+    struct pipe_framebuffer_state *fb =
+        (struct pipe_framebuffer_state*)r300->fb_state.state;
+    unsigned src_width0 = r300_resource(src)->tex.width0;
+    unsigned src_height0 = r300_resource(src)->tex.height0;
+    unsigned dst_width0 = r300_resource(dst)->tex.width0;
+    unsigned dst_height0 = r300_resource(dst)->tex.height0;
+    unsigned layout;
+    struct pipe_box box;
+    struct pipe_sampler_view src_templ, *src_view;
+    struct pipe_surface dst_templ, *dst_view;
 
-    if (util_format_is_depth_or_stencil(dst->format))
-       bind = PIPE_BIND_DEPTH_STENCIL;
-    else
-       bind = PIPE_BIND_RENDER_TARGET;
-
-    if (dst->format != src->format) {
-        debug_printf("r300: Implementation error: Format mismatch in %s\n"
-            "    : src: %s dst: %s\n", __FUNCTION__,
-            util_format_short_name(src->format),
-            util_format_short_name(dst->format));
-        debug_assert(0);
-    }
-
-    if (!pipe->screen->is_format_supported(pipe->screen,
-                                           old_format, src->target,
-                                           src->nr_samples,
-                                           PIPE_BIND_RENDER_TARGET |
-                                           PIPE_BIND_SAMPLER_VIEW, 0) &&
-        util_format_is_plain(old_format)) {
-        switch (util_format_get_blocksize(old_format)) {
+    /* Fallback for buffers. */
+    if ((dst->target == PIPE_BUFFER && src->target == PIPE_BUFFER) ||
+        !r300_is_blit_supported(dst->format)) {
+        util_resource_copy_region(pipe, dst, dst_level, dstx, dsty, dstz,
+                                  src, src_level, src_box);
+        return;
+    }
+
+    /* The code below changes the texture format so that the copy can be done
+     * on hardware. E.g. depth-stencil surfaces are copied as RGBA
+     * colorbuffers. */
+
+    util_blitter_default_dst_texture(&dst_templ, dst, dst_level, dstz, src_box);
+    util_blitter_default_src_texture(&src_templ, src, src_level);
+
+    layout = util_format_description(dst_templ.format)->layout;
+
+    /* Handle non-renderable plain formats. */
+    if (layout == UTIL_FORMAT_LAYOUT_PLAIN &&
+        (!screen->is_format_supported(screen, src_templ.format, src->target,
+                                      src->nr_samples,
+                                      PIPE_BIND_SAMPLER_VIEW) ||
+         !screen->is_format_supported(screen, dst_templ.format, dst->target,
+                                      dst->nr_samples,
+                                      PIPE_BIND_RENDER_TARGET))) {
+        switch (util_format_get_blocksize(dst_templ.format)) {
             case 1:
-                new_format = PIPE_FORMAT_I8_UNORM;
+                dst_templ.format = PIPE_FORMAT_I8_UNORM;
                 break;
             case 2:
-                new_format = PIPE_FORMAT_B4G4R4A4_UNORM;
+                dst_templ.format = PIPE_FORMAT_B4G4R4A4_UNORM;
                 break;
             case 4:
-                new_format = PIPE_FORMAT_B8G8R8A8_UNORM;
+                dst_templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
                 break;
             case 8:
-                new_format = PIPE_FORMAT_R16G16B16A16_UNORM;
+                dst_templ.format = PIPE_FORMAT_R16G16B16A16_UNORM;
                 break;
             default:
-                debug_printf("r300: surface_copy: Unhandled format: %s. Falling back to software.\n"
-                             "r300: surface_copy: Software fallback doesn't work for tiled textures.\n",
-                             util_format_short_name(old_format));
+                debug_printf("r300: copy_region: Unhandled format: %s. Falling back to software.\n"
+                             "r300: copy_region: Software fallback doesn't work for tiled textures.\n",
+                             util_format_short_name(dst_templ.format));
         }
+        src_templ.format = dst_templ.format;
     }
 
-    if (old_format != new_format) {
-        dst->format = new_format;
-        src->format = new_format;
+    /* Handle compressed formats. */
+    if (layout == UTIL_FORMAT_LAYOUT_S3TC ||
+        layout == UTIL_FORMAT_LAYOUT_RGTC) {
+        assert(src_templ.format == dst_templ.format);
 
-        r300_texture_reinterpret_format(pipe->screen,
-                                        dst, new_format);
-        r300_texture_reinterpret_format(pipe->screen,
-                                        src, new_format);
-    }
-
-    srcsurf = screen->get_tex_surface(screen, src,
-                                      subsrc.face, subsrc.level, srcz,
-                                      PIPE_BIND_SAMPLER_VIEW);
+        box = *src_box;
+        src_box = &box;
 
-    dstsurf = screen->get_tex_surface(screen, dst,
-                                      subdst.face, subdst.level, dstz,
-                                      bind);
+        dst_width0 = align(dst_width0, 4);
+        dst_height0 = align(dst_height0, 4);
+        src_width0 = align(src_width0, 4);
+        src_height0 = align(src_height0, 4);
+        box.width = align(box.width, 4);
+        box.height = align(box.height, 4);
 
-    r300_hw_copy(pipe, dstsurf, dstx, dsty, srcsurf, srcx, srcy, width, height);
+        switch (util_format_get_blocksize(dst_templ.format)) {
+        case 8:
+            /* one 4x4 pixel block has 8 bytes.
+             * we set 1 pixel = 4 bytes ===> 1 block corrensponds to 2 pixels. */
+            dst_templ.format = PIPE_FORMAT_R8G8B8A8_UNORM;
+            dst_width0 = dst_width0 / 2;
+            src_width0 = src_width0 / 2;
+            dstx /= 2;
+            box.x /= 2;
+            box.width /= 2;
+            break;
+        case 16:
+            /* one 4x4 pixel block has 16 bytes.
+             * we set 1 pixel = 4 bytes ===> 1 block corresponds to 4 pixels. */
+            dst_templ.format = PIPE_FORMAT_R8G8B8A8_UNORM;
+            break;
+        }
+        src_templ.format = dst_templ.format;
 
-    pipe_surface_reference(&srcsurf, NULL);
-    pipe_surface_reference(&dstsurf, NULL);
+        dst_height0 = dst_height0 / 4;
+        src_height0 = src_height0 / 4;
+        dsty /= 4;
+        box.y /= 4;
+        box.height /= 4;
+    }
 
-    if (old_format != new_format) {
-        dst->format = old_format;
-        src->format = old_format;
+    /* Fallback for textures. */
+    if (!screen->is_format_supported(screen, dst_templ.format,
+                                     dst->target, dst->nr_samples,
+                                     PIPE_BIND_RENDER_TARGET) ||
+       !screen->is_format_supported(screen, src_templ.format,
+                                     src->target, src->nr_samples,
+                                     PIPE_BIND_SAMPLER_VIEW)) {
+        assert(0 && "this shouldn't happen, update r300_is_blit_supported");
+        util_resource_copy_region(pipe, dst, dst_level, dstx, dsty, dstz,
+                                  src, src_level, src_box);
+        return;
+    }
 
-        r300_texture_reinterpret_format(pipe->screen,
-                                        dst, old_format);
-        r300_texture_reinterpret_format(pipe->screen,
-                                        src, old_format);
+    /* Decompress ZMASK. */
+    if (r300->zmask_in_use && !r300->locked_zbuffer) {
+        if (fb->zsbuf->texture == src ||
+            fb->zsbuf->texture == dst) {
+            r300_decompress_zmask(r300);
+        }
     }
-}
 
-/* Fill a region of a surface with a constant value. */
-void r300_resource_fill_region(struct pipe_context *pipe,
-                               struct pipe_resource *dst,
-                               struct pipe_subresource subdst,
-                               unsigned dstx, unsigned dsty, unsigned dstz,
-                               unsigned width, unsigned height,
-                               unsigned value)
-{
-    struct r300_context *r300 = r300_context(pipe);
+    dst_view = r300_create_surface_custom(pipe, dst, &dst_templ, dst_width0, dst_height0);
+    src_view = r300_create_sampler_view_custom(pipe, src, &src_templ, src_width0, src_height0);
+
+    r300_blitter_begin(r300, R300_COPY);
+    util_blitter_copy_texture_view(r300->blitter, dst_view, dstx, dsty,
+                                   src_view, src_box,
+                                   src_width0, src_height0);
+    r300_blitter_end(r300);
 
-    r300_blitter_save_states(r300);
-    util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
+    pipe_surface_reference(&dst_view, NULL);
+    pipe_sampler_view_reference(&src_view, NULL);
+}
 
-    util_blitter_fill_region(r300->blitter, dst, subdst,
-                             dstx, dsty, dstz, width, height, value);
+void r300_init_blit_functions(struct r300_context *r300)
+{
+    r300->context.clear = r300_clear;
+    r300->context.clear_render_target = r300_clear_render_target;
+    r300->context.clear_depth_stencil = r300_clear_depth_stencil;
+    r300->context.resource_copy_region = r300_resource_copy_region;
 }