+static void radeonSetSpanFunctions(struct radeon_renderbuffer *rrb);
+
+/* radeon tiling on r300-r500 has 4 states,
+ macro-linear/micro-linear
+ macro-linear/micro-tiled
+ macro-tiled /micro-linear
+ macro-tiled /micro-tiled
+ 1 byte surface
+ 2 byte surface - two types - we only provide 8x2 microtiling
+ 4 byte surface
+ 8/16 byte (unused)
+*/
+
+static GLubyte *radeon_ptr_4byte(const struct radeon_renderbuffer * rrb,
+ GLint x, GLint y)
+{
+ GLubyte *ptr = rrb->bo->ptr;
+ uint32_t mask = RADEON_BO_FLAGS_MACRO_TILE | RADEON_BO_FLAGS_MICRO_TILE;
+ GLint offset;
+
+ if (rrb->has_surface || !(rrb->bo->flags & mask)) {
+ offset = x * rrb->cpp + y * rrb->pitch;
+ } else {
+ offset = 0;
+ if (rrb->bo->flags & RADEON_BO_FLAGS_MACRO_TILE) {
+ if (rrb->bo->flags & RADEON_BO_FLAGS_MICRO_TILE) {
+ offset = ((y >> 4) * (rrb->pitch >> 7) + (x >> 5)) << 11;
+ offset += (((y >> 3) ^ (x >> 5)) & 0x1) << 10;
+ offset += (((y >> 4) ^ (x >> 4)) & 0x1) << 9;
+ offset += (((y >> 2) ^ (x >> 4)) & 0x1) << 8;
+ offset += (((y >> 3) ^ (x >> 3)) & 0x1) << 7;
+ offset += ((y >> 1) & 0x1) << 6;
+ offset += ((x >> 2) & 0x1) << 5;
+ offset += (y & 1) << 4;
+ offset += (x & 3) << 2;
+ } else {
+ offset = ((y >> 3) * (rrb->pitch >> 8) + (x >> 6)) << 11;
+ offset += (((y >> 2) ^ (x >> 6)) & 0x1) << 10;
+ offset += (((y >> 3) ^ (x >> 5)) & 0x1) << 9;
+ offset += (((y >> 1) ^ (x >> 5)) & 0x1) << 8;
+ offset += (((y >> 2) ^ (x >> 4)) & 0x1) << 7;
+ offset += (y & 1) << 6;
+ offset += (x & 15) << 2;
+ }
+ } else {
+ offset = ((y >> 1) * (rrb->pitch >> 4) + (x >> 2)) << 5;
+ offset += (y & 1) << 4;
+ offset += (x & 3) << 2;
+ }
+ }
+ return &ptr[offset];
+}
+
+static GLubyte *radeon_ptr_2byte_8x2(const struct radeon_renderbuffer * rrb,
+ GLint x, GLint y)
+{
+ GLubyte *ptr = rrb->bo->ptr;
+ uint32_t mask = RADEON_BO_FLAGS_MACRO_TILE | RADEON_BO_FLAGS_MICRO_TILE;
+ GLint offset;
+
+ if (rrb->has_surface || !(rrb->bo->flags & mask)) {
+ offset = x * rrb->cpp + y * rrb->pitch;
+ } else {
+ offset = 0;
+ if (rrb->bo->flags & RADEON_BO_FLAGS_MACRO_TILE) {
+ if (rrb->bo->flags & RADEON_BO_FLAGS_MICRO_TILE) {
+ offset = ((y >> 4) * (rrb->pitch >> 7) + (x >> 6)) << 11;
+ offset += (((y >> 3) ^ (x >> 6)) & 0x1) << 10;
+ offset += (((y >> 4) ^ (x >> 5)) & 0x1) << 9;
+ offset += (((y >> 2) ^ (x >> 5)) & 0x1) << 8;
+ offset += (((y >> 3) ^ (x >> 4)) & 0x1) << 7;
+ offset += ((y >> 1) & 0x1) << 6;
+ offset += ((x >> 3) & 0x1) << 5;
+ offset += (y & 1) << 4;
+ offset += (x & 3) << 2;
+ } else {
+ offset = ((y >> 3) * (rrb->pitch >> 8) + (x >> 7)) << 11;
+ offset += (((y >> 2) ^ (x >> 7)) & 0x1) << 10;
+ offset += (((y >> 3) ^ (x >> 6)) & 0x1) << 9;
+ offset += (((y >> 1) ^ (x >> 6)) & 0x1) << 8;
+ offset += (((y >> 2) ^ (x >> 5)) & 0x1) << 7;
+ offset += (y & 1) << 6;
+ offset += ((x >> 4) & 0x1) << 5;
+ offset += (x & 15) << 2;
+ }
+ } else {
+ offset = ((y >> 1) * (rrb->pitch >> 4) + (x >> 3)) << 5;
+ offset += (y & 0x1) << 4;
+ offset += (x & 0x7) << 1;
+ }
+ }
+ return &ptr[offset];
+}
+
+#ifndef COMPILE_R300
+static uint32_t
+z24s8_to_s8z24(uint32_t val)
+{
+ return (val << 24) | (val >> 8);
+}
+
+static uint32_t
+s8z24_to_z24s8(uint32_t val)
+{
+ return (val >> 24) | (val << 8);
+}
+#endif
+