gallium: new, unified pipe_context::set_sampler_views() function
[mesa.git] / src / gallium / auxiliary / vl / vl_idct.c
index a5b2053065e2abbb9bcc0127c9bf47e50439b50f..79adb045dad4ed6cf21dee3447c28c72e8a047b3 100644 (file)
  *
  **************************************************************************/
 
-#include "vl_idct.h"
-#include "vl_vertex_buffers.h"
-#include "util/u_draw.h"
 #include <assert.h>
-#include <pipe/p_context.h>
-#include <pipe/p_screen.h>
-#include <util/u_inlines.h>
-#include <util/u_sampler.h>
-#include <util/u_format.h>
-#include <tgsi/tgsi_ureg.h>
-#include "vl_types.h"
 
-#define BLOCK_WIDTH 8
-#define BLOCK_HEIGHT 8
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
 
-#define SCALE_FACTOR_16_TO_9 (32768.0f / 256.0f)
+#include "util/u_draw.h"
+#include "util/u_sampler.h"
+#include "util/u_memory.h"
 
-#define STAGE1_SCALE 4.0f
-#define STAGE2_SCALE (SCALE_FACTOR_16_TO_9 / STAGE1_SCALE)
+#include "tgsi/tgsi_ureg.h"
 
-#define NR_RENDER_TARGETS 1
+#include "vl_defines.h"
+#include "vl_types.h"
+#include "vl_vertex_buffers.h"
+#include "vl_idct.h"
 
-enum VS_INPUT
+enum VS_OUTPUT
 {
-   VS_I_RECT,
-   VS_I_VPOS,
+   VS_O_VPOS = 0,
+   VS_O_L_ADDR0 = 0,
+   VS_O_L_ADDR1,
+   VS_O_R_ADDR0,
+   VS_O_R_ADDR1
+};
 
-   NUM_VS_INPUTS
+/**
+ * The DCT matrix stored as hex representation of floats. Equal to the following equation:
+ * for (i = 0; i < 8; ++i)
+ *    for (j = 0; j < 8; ++j)
+ *       if (i == 0) const_matrix[i][j] = 1.0f / sqrtf(8.0f);
+ *       else const_matrix[i][j] = sqrtf(2.0f / 8.0f) * cosf((2 * j + 1) * i * M_PI / (2.0f * 8.0f));
+ */
+static const uint32_t const_matrix[8][8] = {
+   { 0x3eb504f3, 0x3eb504f3, 0x3eb504f3, 0x3eb504f3, 0x3eb504f3, 0x3eb504f3, 0x3eb504f3, 0x3eb504f3 },
+   { 0x3efb14be, 0x3ed4db31, 0x3e8e39da, 0x3dc7c5c4, 0xbdc7c5c2, 0xbe8e39d9, 0xbed4db32, 0xbefb14bf },
+   { 0x3eec835f, 0x3e43ef15, 0xbe43ef14, 0xbeec835e, 0xbeec835f, 0xbe43ef1a, 0x3e43ef1b, 0x3eec835f },
+   { 0x3ed4db31, 0xbdc7c5c2, 0xbefb14bf, 0xbe8e39dd, 0x3e8e39d7, 0x3efb14bf, 0x3dc7c5d0, 0xbed4db34 },
+   { 0x3eb504f3, 0xbeb504f3, 0xbeb504f4, 0x3eb504f1, 0x3eb504f3, 0xbeb504f0, 0xbeb504ef, 0x3eb504f4 },
+   { 0x3e8e39da, 0xbefb14bf, 0x3dc7c5c8, 0x3ed4db32, 0xbed4db34, 0xbdc7c5bb, 0x3efb14bf, 0xbe8e39d7 },
+   { 0x3e43ef15, 0xbeec835f, 0x3eec835f, 0xbe43ef07, 0xbe43ef23, 0x3eec8361, 0xbeec835c, 0x3e43ef25 },
+   { 0x3dc7c5c4, 0xbe8e39dd, 0x3ed4db32, 0xbefb14c0, 0x3efb14be, 0xbed4db31, 0x3e8e39ce, 0xbdc7c596 },
 };
 
-enum VS_OUTPUT
+static void
+calc_addr(struct ureg_program *shader, struct ureg_dst addr[2],
+          struct ureg_src tc, struct ureg_src start, bool right_side,
+          bool transposed, float size)
 {
-   VS_O_VPOS,
-   VS_O_BLOCK,
-   VS_O_TEX,
-   VS_O_START
-};
+   unsigned wm_start = (right_side == transposed) ? TGSI_WRITEMASK_X : TGSI_WRITEMASK_Y;
+   unsigned sw_start = right_side ? TGSI_SWIZZLE_Y : TGSI_SWIZZLE_X;
 
-static const float const_matrix[8][8] = {
-   {  0.3535530f,  0.3535530f,  0.3535530f,  0.3535530f,  0.3535530f,  0.3535530f,  0.353553f,  0.3535530f },
-   {  0.4903930f,  0.4157350f,  0.2777850f,  0.0975451f, -0.0975452f, -0.2777850f, -0.415735f, -0.4903930f },
-   {  0.4619400f,  0.1913420f, -0.1913420f, -0.4619400f, -0.4619400f, -0.1913420f,  0.191342f,  0.4619400f },
-   {  0.4157350f, -0.0975452f, -0.4903930f, -0.2777850f,  0.2777850f,  0.4903930f,  0.097545f, -0.4157350f },
-   {  0.3535530f, -0.3535530f, -0.3535530f,  0.3535540f,  0.3535530f, -0.3535540f, -0.353553f,  0.3535530f },
-   {  0.2777850f, -0.4903930f,  0.0975452f,  0.4157350f, -0.4157350f, -0.0975451f,  0.490393f, -0.2777850f },
-   {  0.1913420f, -0.4619400f,  0.4619400f, -0.1913420f, -0.1913410f,  0.4619400f, -0.461940f,  0.1913420f },
-   {  0.0975451f, -0.2777850f,  0.4157350f, -0.4903930f,  0.4903930f, -0.4157350f,  0.277786f, -0.0975458f }
-};
+   unsigned wm_tc = (right_side == transposed) ? TGSI_WRITEMASK_Y : TGSI_WRITEMASK_X;
+   unsigned sw_tc = right_side ? TGSI_SWIZZLE_X : TGSI_SWIZZLE_Y;
+
+   /*
+    * addr[0..1].(start) = right_side ? start.x : tc.x
+    * addr[0..1].(tc) = right_side ? tc.y : start.y
+    * addr[0..1].z = tc.z
+    * addr[1].(start) += 1.0f / scale
+    */
+   ureg_MOV(shader, ureg_writemask(addr[0], wm_start), ureg_scalar(start, sw_start));
+   ureg_MOV(shader, ureg_writemask(addr[0], wm_tc), ureg_scalar(tc, sw_tc));
+
+   ureg_ADD(shader, ureg_writemask(addr[1], wm_start), ureg_scalar(start, sw_start), ureg_imm1f(shader, 1.0f / size));
+   ureg_MOV(shader, ureg_writemask(addr[1], wm_tc), ureg_scalar(tc, sw_tc));
+}
+
+static void
+increment_addr(struct ureg_program *shader, struct ureg_dst daddr[2],
+               struct ureg_src saddr[2], bool right_side, bool transposed,
+               int pos, float size)
+{
+   unsigned wm_start = (right_side == transposed) ? TGSI_WRITEMASK_X : TGSI_WRITEMASK_Y;
+   unsigned wm_tc = (right_side == transposed) ? TGSI_WRITEMASK_Y : TGSI_WRITEMASK_X;
+
+   /*
+    * daddr[0..1].(start) = saddr[0..1].(start)
+    * daddr[0..1].(tc) = saddr[0..1].(tc)
+    */
+
+   ureg_MOV(shader, ureg_writemask(daddr[0], wm_start), saddr[0]);
+   ureg_ADD(shader, ureg_writemask(daddr[0], wm_tc), saddr[0], ureg_imm1f(shader, pos / size));
+   ureg_MOV(shader, ureg_writemask(daddr[1], wm_start), saddr[1]);
+   ureg_ADD(shader, ureg_writemask(daddr[1], wm_tc), saddr[1], ureg_imm1f(shader, pos / size));
+}
+
+static void
+fetch_four(struct ureg_program *shader, struct ureg_dst m[2], struct ureg_src addr[2],
+           struct ureg_src sampler, bool resource3d)
+{
+   ureg_TEX(shader, m[0], resource3d ? TGSI_TEXTURE_3D : TGSI_TEXTURE_2D, addr[0], sampler);
+   ureg_TEX(shader, m[1], resource3d ? TGSI_TEXTURE_3D : TGSI_TEXTURE_2D, addr[1], sampler);
+}
+
+static void
+matrix_mul(struct ureg_program *shader, struct ureg_dst dst, struct ureg_dst l[2], struct ureg_dst r[2])
+{
+   struct ureg_dst tmp;
+
+   tmp = ureg_DECL_temporary(shader);
+
+   /*
+    * tmp.xy = dot4(m[0][0..1], m[1][0..1])
+    * dst = tmp.x + tmp.y
+    */
+   ureg_DP4(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), ureg_src(l[0]), ureg_src(r[0]));
+   ureg_DP4(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), ureg_src(l[1]), ureg_src(r[1]));
+   ureg_ADD(shader, dst,
+      ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X),
+      ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y));
+
+   ureg_release_temporary(shader, tmp);
+}
 
 static void *
-create_vert_shader(struct vl_idct *idct)
+create_mismatch_vert_shader(struct vl_idct *idct)
 {
    struct ureg_program *shader;
+   struct ureg_src vpos;
    struct ureg_src scale;
-   struct ureg_src vrect, vpos;
-   struct ureg_dst t_vpos;
-   struct ureg_dst o_vpos, o_block, o_tex, o_start;
+   struct ureg_dst t_tex;
+   struct ureg_dst o_vpos, o_addr[2];
 
    shader = ureg_create(TGSI_PROCESSOR_VERTEX);
    if (!shader)
       return NULL;
 
-   t_vpos = ureg_DECL_temporary(shader);
-
-   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
    vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
 
+   t_tex = ureg_DECL_temporary(shader);
+
    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
-   o_block = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_BLOCK);
-   o_tex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_TEX);
-   o_start = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_START);
+
+   o_addr[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR0);
+   o_addr[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR1);
 
    /*
-    * scale = (BLOCK_WIDTH, BLOCK_HEIGHT) / (dst.width, dst.height)
+    * scale = (VL_BLOCK_WIDTH, VL_BLOCK_HEIGHT) / (dst.width, dst.height)
     *
-    * t_vpos = vpos + vrect
+    * t_vpos = vpos + 7 / VL_BLOCK_WIDTH
     * o_vpos.xy = t_vpos * scale
-    * o_vpos.zw = vpos
     *
-    * o_block = vrect
-    * o_tex = t_pos
-    * o_start = vpos * scale
+    * o_addr = calc_addr(...)
     *
     */
+
    scale = ureg_imm2f(shader,
-      (float)BLOCK_WIDTH / idct->destination->width0, 
-      (float)BLOCK_HEIGHT / idct->destination->height0);
+      (float)VL_BLOCK_WIDTH / idct->buffer_width,
+      (float)VL_BLOCK_HEIGHT / idct->buffer_height);
 
-   ureg_ADD(shader, ureg_writemask(t_vpos, TGSI_WRITEMASK_XY), vpos, vrect);
-   ureg_MUL(shader, ureg_writemask(t_vpos, TGSI_WRITEMASK_XY), ureg_src(t_vpos), scale);
-   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), ureg_src(t_vpos));
-   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), vpos);
+   ureg_MAD(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), vpos, scale, scale);
+   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), ureg_imm1f(shader, 1.0f));
 
-   ureg_MOV(shader, ureg_writemask(o_block, TGSI_WRITEMASK_XY), vrect);
-   ureg_MOV(shader, ureg_writemask(o_tex, TGSI_WRITEMASK_XY), ureg_src(t_vpos));
-   ureg_MUL(shader, ureg_writemask(o_start, TGSI_WRITEMASK_XY), vpos, scale);
+   ureg_MUL(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_XY), vpos, scale);
+   calc_addr(shader, o_addr, ureg_src(t_tex), ureg_src(t_tex), false, false, idct->buffer_width / 4);
 
-   ureg_release_temporary(shader, t_vpos);
+   ureg_release_temporary(shader, t_tex);
 
    ureg_END(shader);
 
    return ureg_create_shader_and_destroy(shader, idct->pipe);
 }
 
-static void
-fetch_four(struct ureg_program *shader, struct ureg_dst m[2],
-           struct ureg_src tc, struct ureg_src sampler,
-           struct ureg_src start, struct ureg_src block,
-           bool right_side, bool transposed, float size)
+static void *
+create_mismatch_frag_shader(struct vl_idct *idct)
 {
-   struct ureg_dst t_tc;
-   unsigned wm_start = (right_side == transposed) ? TGSI_WRITEMASK_X : TGSI_WRITEMASK_Y;
-   unsigned wm_tc = (right_side == transposed) ? TGSI_WRITEMASK_Y : TGSI_WRITEMASK_X;
+   struct ureg_program *shader;
 
-   t_tc = ureg_DECL_temporary(shader);
-   m[0] = ureg_DECL_temporary(shader);
-   m[1] = ureg_DECL_temporary(shader);
+   struct ureg_src addr[2];
 
-   /*
-    * t_tc.x = right_side ? start.x : tc.x
-    * t_tc.y = right_side ? tc.y : start.y
-    * m[0..1] = tex(t_tc++, sampler)
-    */
-   if(!right_side) {
-      ureg_MOV(shader, ureg_writemask(t_tc, wm_start), ureg_scalar(start, TGSI_SWIZZLE_X));
-      ureg_MOV(shader, ureg_writemask(t_tc, wm_tc), ureg_scalar(tc, TGSI_SWIZZLE_Y));
-   } else {
-      ureg_MOV(shader, ureg_writemask(t_tc, wm_start), ureg_scalar(start, TGSI_SWIZZLE_Y));
-      ureg_MOV(shader, ureg_writemask(t_tc, wm_tc), ureg_scalar(tc, TGSI_SWIZZLE_X));
-   }
+   struct ureg_dst m[8][2];
+   struct ureg_dst fragment;
 
-#if NR_RENDER_TARGETS == 8
-   ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Z), ureg_scalar(block, TGSI_SWIZZLE_X));
-#else
-   ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Z), ureg_imm1f(shader, 0.0f));
-#endif
+   unsigned i;
 
-   ureg_TEX(shader, m[0], TGSI_TEXTURE_3D, ureg_src(t_tc), sampler);
-   ureg_ADD(shader, ureg_writemask(t_tc, wm_start), ureg_src(t_tc), ureg_imm1f(shader, 1.0f / size));
-   ureg_TEX(shader, m[1], TGSI_TEXTURE_3D, ureg_src(t_tc), sampler);
+   shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
+   if (!shader)
+      return NULL;
 
-   ureg_release_temporary(shader, t_tc);
-}
+   addr[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR0, TGSI_INTERPOLATE_LINEAR);
+   addr[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR1, TGSI_INTERPOLATE_LINEAR);
 
-static void
-matrix_mul(struct ureg_program *shader, struct ureg_dst dst, struct ureg_dst l[2], struct ureg_dst r[2])
-{
-   struct ureg_dst tmp[2];
-   unsigned i;
+   fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 
-   for(i = 0; i < 2; ++i) {
-      tmp[i] = ureg_DECL_temporary(shader);
+   for (i = 0; i < 8; ++i) {
+      m[i][0] = ureg_DECL_temporary(shader);
+      m[i][1] = ureg_DECL_temporary(shader);
    }
 
-   /*
-    * tmp[0..1] = dot4(m[0][0..1], m[1][0..1])
-    * dst = tmp[0] + tmp[1]
-    */
-   ureg_DP4(shader, ureg_writemask(tmp[0], TGSI_WRITEMASK_X), ureg_src(l[0]), ureg_src(r[0]));
-   ureg_DP4(shader, ureg_writemask(tmp[1], TGSI_WRITEMASK_X), ureg_src(l[1]), ureg_src(r[1]));
-   ureg_ADD(shader, dst,
-      ureg_scalar(ureg_src(tmp[0]), TGSI_SWIZZLE_X),
-      ureg_scalar(ureg_src(tmp[1]), TGSI_SWIZZLE_X));
+   for (i = 0; i < 8; ++i) {
+      increment_addr(shader, m[i], addr, false, false, i, idct->buffer_height);
+   }
+
+   for (i = 0; i < 8; ++i) {
+      struct ureg_src s_addr[2];
+      s_addr[0] = ureg_src(m[i][0]);
+      s_addr[1] = ureg_src(m[i][1]);
+      fetch_four(shader, m[i], s_addr, ureg_DECL_sampler(shader, 0), false);
+   }
+
+   for (i = 1; i < 8; ++i) {
+      ureg_ADD(shader, m[0][0], ureg_src(m[0][0]), ureg_src(m[i][0]));
+      ureg_ADD(shader, m[0][1], ureg_src(m[0][1]), ureg_src(m[i][1]));
+   }
+
+   ureg_ADD(shader, m[0][0], ureg_src(m[0][0]), ureg_src(m[0][1]));
+   ureg_DP4(shader, m[0][0], ureg_abs(ureg_src(m[0][0])), ureg_imm1f(shader, 1 << 14));
+
+   ureg_MUL(shader, ureg_writemask(m[0][0], TGSI_WRITEMASK_W), ureg_abs(ureg_src(m[7][1])), ureg_imm1f(shader, 1 << 14));
+   ureg_FRC(shader, m[0][0], ureg_src(m[0][0]));
+   ureg_SGT(shader, m[0][0], ureg_imm1f(shader, 0.5f), ureg_abs(ureg_src(m[0][0])));
+
+   ureg_CMP(shader, ureg_writemask(m[0][0], TGSI_WRITEMASK_W), ureg_negate(ureg_src(m[0][0])),
+            ureg_imm1f(shader, 1.0f / (1 << 15)), ureg_imm1f(shader, -1.0f / (1 << 15)));
+   ureg_MUL(shader, ureg_writemask(m[0][0], TGSI_WRITEMASK_W), ureg_src(m[0][0]),
+            ureg_scalar(ureg_src(m[0][0]), TGSI_SWIZZLE_X));
+
+   ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ), ureg_src(m[7][1]));
+   ureg_ADD(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_src(m[0][0]), ureg_src(m[7][1]));
 
-   for(i = 0; i < 2; ++i) {
-      ureg_release_temporary(shader, tmp[i]);
+   for (i = 0; i < 8; ++i) {
+      ureg_release_temporary(shader, m[i][0]);
+      ureg_release_temporary(shader, m[i][1]);
    }
+
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, idct->pipe);
 }
 
 static void *
-create_transpose_frag_shader(struct vl_idct *idct)
+create_stage1_vert_shader(struct vl_idct *idct)
 {
-   struct pipe_resource *transpose = idct->textures.individual.transpose;
-   struct pipe_resource *intermediate = idct->textures.individual.intermediate;
-
    struct ureg_program *shader;
+   struct ureg_src vrect, vpos;
+   struct ureg_src scale;
+   struct ureg_dst t_tex, t_start;
+   struct ureg_dst o_vpos, o_l_addr[2], o_r_addr[2];
 
-   struct ureg_src block, tex, sampler[2];
-   struct ureg_src start[2];
-
-   struct ureg_dst l[2], r[2];
-   struct ureg_dst tmp, fragment;
-
-   shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
+   shader = ureg_create(TGSI_PROCESSOR_VERTEX);
    if (!shader)
       return NULL;
 
-   block = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_BLOCK, TGSI_INTERPOLATE_LINEAR);
-   tex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_TEX, TGSI_INTERPOLATE_CONSTANT);
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
 
-   sampler[0] = ureg_DECL_sampler(shader, 0);
-   sampler[1] = ureg_DECL_sampler(shader, 1);
+   t_tex = ureg_DECL_temporary(shader);
+   t_start = ureg_DECL_temporary(shader);
 
-   start[0] = ureg_imm1f(shader, 0.0f);
-   start[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_START, TGSI_INTERPOLATE_CONSTANT);
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
 
-   fetch_four(shader, l, block, sampler[0], start[0], block, false, false, transpose->width0);
-   fetch_four(shader, r, tex, sampler[1], start[1], block, true, false, intermediate->height0);
+   o_l_addr[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR0);
+   o_l_addr[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR1);
 
-   fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
+   o_r_addr[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_R_ADDR0);
+   o_r_addr[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_R_ADDR1);
 
-   tmp = ureg_DECL_temporary(shader);
-   matrix_mul(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), l, r);
-   ureg_MUL(shader, fragment, ureg_src(tmp), ureg_imm1f(shader, STAGE2_SCALE));
+   /*
+    * scale = (VL_BLOCK_WIDTH, VL_BLOCK_HEIGHT) / (dst.width, dst.height)
+    *
+    * t_vpos = vpos + vrect
+    * o_vpos.xy = t_vpos * scale
+    * o_vpos.zw = vpos
+    *
+    * o_l_addr = calc_addr(...)
+    * o_r_addr = calc_addr(...)
+    *
+    */
 
-   ureg_release_temporary(shader, tmp);
-   ureg_release_temporary(shader, l[0]);
-   ureg_release_temporary(shader, l[1]);
-   ureg_release_temporary(shader, r[0]);
-   ureg_release_temporary(shader, r[1]);
+   scale = ureg_imm2f(shader,
+      (float)VL_BLOCK_WIDTH / idct->buffer_width,
+      (float)VL_BLOCK_HEIGHT / idct->buffer_height);
+
+   ureg_ADD(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_XY), vpos, vrect);
+   ureg_MUL(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_XY), ureg_src(t_tex), scale);
+
+   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), ureg_src(t_tex));
+   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), ureg_imm1f(shader, 1.0f));
+
+   ureg_MUL(shader, ureg_writemask(t_start, TGSI_WRITEMASK_XY), vpos, scale);
+
+   calc_addr(shader, o_l_addr, ureg_src(t_tex), ureg_src(t_start), false, false, idct->buffer_width / 4);
+   calc_addr(shader, o_r_addr, vrect, ureg_imm1f(shader, 0.0f), true, true, VL_BLOCK_WIDTH / 4);
+
+   ureg_release_temporary(shader, t_tex);
+   ureg_release_temporary(shader, t_start);
 
    ureg_END(shader);
 
@@ -242,284 +318,370 @@ create_transpose_frag_shader(struct vl_idct *idct)
 }
 
 static void *
-create_matrix_frag_shader(struct vl_idct *idct)
+create_stage1_frag_shader(struct vl_idct *idct)
 {
-   struct pipe_resource *matrix = idct->textures.individual.matrix;
-   struct pipe_resource *source = idct->textures.individual.source;
-
    struct ureg_program *shader;
 
-   struct ureg_src tex, block, sampler[2];
-   struct ureg_src start[2];
+   struct ureg_src l_addr[2], r_addr[2];
 
    struct ureg_dst l[4][2], r[2];
-   struct ureg_dst t_tc, tmp, fragment[NR_RENDER_TARGETS];
+   struct ureg_dst *fragment;
 
-   unsigned i, j;
+   int i, j;
 
    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
    if (!shader)
       return NULL;
 
-   t_tc = ureg_DECL_temporary(shader);
-   tmp = ureg_DECL_temporary(shader);
-
-   tex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_TEX, TGSI_INTERPOLATE_LINEAR);
-   block = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_BLOCK, TGSI_INTERPOLATE_LINEAR);
+   fragment = MALLOC(idct->nr_of_render_targets * sizeof(struct ureg_dst));
 
-   sampler[0] = ureg_DECL_sampler(shader, 1);
-   sampler[1] = ureg_DECL_sampler(shader, 0);
+   l_addr[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR0, TGSI_INTERPOLATE_LINEAR);
+   l_addr[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_L_ADDR1, TGSI_INTERPOLATE_LINEAR);
 
-   start[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_START, TGSI_INTERPOLATE_CONSTANT);
-   start[1] = ureg_imm1f(shader, 0.0f);
+   r_addr[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_R_ADDR0, TGSI_INTERPOLATE_LINEAR);
+   r_addr[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_R_ADDR1, TGSI_INTERPOLATE_LINEAR);
 
-   for (i = 0; i < NR_RENDER_TARGETS; ++i)
+   for (i = 0; i < idct->nr_of_render_targets; ++i)
        fragment[i] = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, i);
 
-   ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Y), tex);
    for (i = 0; i < 4; ++i) {
-      fetch_four(shader, l[i], ureg_src(t_tc), sampler[0], start[0], block, false, false, source->width0);
-      ureg_MUL(shader, l[i][0], ureg_src(l[i][0]), ureg_imm1f(shader, STAGE1_SCALE));
-      ureg_MUL(shader, l[i][1], ureg_src(l[i][1]), ureg_imm1f(shader, STAGE1_SCALE));
-      if(i != 3)
-         ureg_ADD(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Y), 
-            ureg_src(t_tc), ureg_imm1f(shader, 1.0f / source->height0));
+      l[i][0] = ureg_DECL_temporary(shader);
+      l[i][1] = ureg_DECL_temporary(shader);
+   }
+
+   r[0] = ureg_DECL_temporary(shader);
+   r[1] = ureg_DECL_temporary(shader);
+
+   for (i = 0; i < 4; ++i) {
+      increment_addr(shader, l[i], l_addr, false, false, i - 2, idct->buffer_height);
    }
-   
-   for (i = 0; i < NR_RENDER_TARGETS; ++i) {
-
-#if NR_RENDER_TARGETS == 8
-      ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_X), ureg_imm1f(shader, 1.0f / BLOCK_WIDTH * i));
-      fetch_four(shader, r, ureg_src(t_tc), sampler[1], start[1], block, true, true, matrix->width0);
-#elif NR_RENDER_TARGETS == 1
-      fetch_four(shader, r, block, sampler[1], start[1], block, true, true, matrix->width0);
-#else
-#error invalid number of render targets
-#endif
+
+   for (i = 0; i < 4; ++i) {
+      struct ureg_src s_addr[2];
+      s_addr[0] = ureg_src(l[i][0]);
+      s_addr[1] = ureg_src(l[i][1]);
+      fetch_four(shader, l[i], s_addr, ureg_DECL_sampler(shader, 0), false);
+   }
+
+   for (i = 0; i < idct->nr_of_render_targets; ++i) {
+      struct ureg_src s_addr[2];
+
+      increment_addr(shader, r, r_addr, true, true, i - (signed)idct->nr_of_render_targets / 2, VL_BLOCK_HEIGHT);
+
+      s_addr[0] = ureg_src(r[0]);
+      s_addr[1] = ureg_src(r[1]);
+      fetch_four(shader, r, s_addr, ureg_DECL_sampler(shader, 1), false);
 
       for (j = 0; j < 4; ++j) {
          matrix_mul(shader, ureg_writemask(fragment[i], TGSI_WRITEMASK_X << j), l[j], r);
       }
-      ureg_release_temporary(shader, r[0]);
-      ureg_release_temporary(shader, r[1]);
    }
 
-   ureg_release_temporary(shader, t_tc);
-   ureg_release_temporary(shader, tmp);
-
    for (i = 0; i < 4; ++i) {
       ureg_release_temporary(shader, l[i][0]);
       ureg_release_temporary(shader, l[i][1]);
    }
+   ureg_release_temporary(shader, r[0]);
+   ureg_release_temporary(shader, r[1]);
 
    ureg_END(shader);
 
+   FREE(fragment);
+
    return ureg_create_shader_and_destroy(shader, idct->pipe);
 }
 
+void
+vl_idct_stage2_vert_shader(struct vl_idct *idct, struct ureg_program *shader,
+                           unsigned first_output, struct ureg_dst tex)
+{
+   struct ureg_src vrect, vpos;
+   struct ureg_src scale;
+   struct ureg_dst t_start;
+   struct ureg_dst o_l_addr[2], o_r_addr[2];
+
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
+
+   t_start = ureg_DECL_temporary(shader);
+
+   --first_output;
+
+   o_l_addr[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, first_output + VS_O_L_ADDR0);
+   o_l_addr[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, first_output + VS_O_L_ADDR1);
+
+   o_r_addr[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, first_output + VS_O_R_ADDR0);
+   o_r_addr[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, first_output + VS_O_R_ADDR1);
+
+   scale = ureg_imm2f(shader,
+      (float)VL_BLOCK_WIDTH / idct->buffer_width,
+      (float)VL_BLOCK_HEIGHT / idct->buffer_height);
+
+   ureg_MUL(shader, ureg_writemask(tex, TGSI_WRITEMASK_Z),
+      ureg_scalar(vrect, TGSI_SWIZZLE_X),
+      ureg_imm1f(shader, VL_BLOCK_WIDTH / idct->nr_of_render_targets));
+   ureg_MUL(shader, ureg_writemask(t_start, TGSI_WRITEMASK_XY), vpos, scale);
+
+   calc_addr(shader, o_l_addr, vrect, ureg_imm1f(shader, 0.0f), false, false, VL_BLOCK_WIDTH / 4);
+   calc_addr(shader, o_r_addr, ureg_src(tex), ureg_src(t_start), true, false, idct->buffer_height / 4);
+
+   ureg_MOV(shader, ureg_writemask(o_r_addr[0], TGSI_WRITEMASK_Z), ureg_src(tex));
+   ureg_MOV(shader, ureg_writemask(o_r_addr[1], TGSI_WRITEMASK_Z), ureg_src(tex));
+}
+
+void
+vl_idct_stage2_frag_shader(struct vl_idct *idct, struct ureg_program *shader,
+                           unsigned first_input, struct ureg_dst fragment)
+{
+   struct ureg_src l_addr[2], r_addr[2];
+
+   struct ureg_dst l[2], r[2];
+
+   --first_input;
+
+   l_addr[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, first_input + VS_O_L_ADDR0, TGSI_INTERPOLATE_LINEAR);
+   l_addr[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, first_input + VS_O_L_ADDR1, TGSI_INTERPOLATE_LINEAR);
+
+   r_addr[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, first_input + VS_O_R_ADDR0, TGSI_INTERPOLATE_LINEAR);
+   r_addr[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, first_input + VS_O_R_ADDR1, TGSI_INTERPOLATE_LINEAR);
+
+   l[0] = ureg_DECL_temporary(shader);
+   l[1] = ureg_DECL_temporary(shader);
+   r[0] = ureg_DECL_temporary(shader);
+   r[1] = ureg_DECL_temporary(shader);
+
+   fetch_four(shader, l, l_addr, ureg_DECL_sampler(shader, 1), false);
+   fetch_four(shader, r, r_addr, ureg_DECL_sampler(shader, 0), true);
+
+   matrix_mul(shader, fragment, l, r);
+
+   ureg_release_temporary(shader, l[0]);
+   ureg_release_temporary(shader, l[1]);
+   ureg_release_temporary(shader, r[0]);
+   ureg_release_temporary(shader, r[1]);
+}
+
 static bool
 init_shaders(struct vl_idct *idct)
 {
-   idct->vs = create_vert_shader(idct);
-   idct->matrix_fs = create_matrix_frag_shader(idct);
-   idct->transpose_fs = create_transpose_frag_shader(idct);
-
-   return 
-      idct->vs != NULL &&
-      idct->transpose_fs != NULL &&
-      idct->matrix_fs != NULL;
+   idct->vs_mismatch = create_mismatch_vert_shader(idct);
+   if (!idct->vs_mismatch)
+      goto error_vs_mismatch;
+
+   idct->fs_mismatch = create_mismatch_frag_shader(idct);
+   if (!idct->fs_mismatch)
+      goto error_fs_mismatch;
+
+   idct->vs = create_stage1_vert_shader(idct);
+   if (!idct->vs)
+      goto error_vs;
+
+   idct->fs = create_stage1_frag_shader(idct);
+   if (!idct->fs)
+      goto error_fs;
+
+   return true;
+
+error_fs:
+   idct->pipe->delete_vs_state(idct->pipe, idct->vs);
+
+error_vs:
+   idct->pipe->delete_vs_state(idct->pipe, idct->vs_mismatch);
+
+error_fs_mismatch:
+   idct->pipe->delete_vs_state(idct->pipe, idct->fs);
+
+error_vs_mismatch:
+   return false;
 }
 
 static void
 cleanup_shaders(struct vl_idct *idct)
 {
+   idct->pipe->delete_vs_state(idct->pipe, idct->vs_mismatch);
+   idct->pipe->delete_fs_state(idct->pipe, idct->fs_mismatch);
    idct->pipe->delete_vs_state(idct->pipe, idct->vs);
-   idct->pipe->delete_fs_state(idct->pipe, idct->matrix_fs);
-   idct->pipe->delete_fs_state(idct->pipe, idct->transpose_fs);
+   idct->pipe->delete_fs_state(idct->pipe, idct->fs);
 }
 
 static bool
-init_buffers(struct vl_idct *idct)
+init_state(struct vl_idct *idct)
 {
-   struct pipe_resource template;
-   struct pipe_sampler_view sampler_view;
-   struct pipe_vertex_element vertex_elems[2];
+   struct pipe_blend_state blend;
+   struct pipe_rasterizer_state rs_state;
+   struct pipe_sampler_state sampler;
    unsigned i;
 
-   memset(&template, 0, sizeof(struct pipe_resource));
-   template.last_level = 0;
-   template.depth0 = 1;
-   template.bind = PIPE_BIND_SAMPLER_VIEW;
-   template.flags = 0;
-
-   template.target = PIPE_TEXTURE_2D;
-   template.format = PIPE_FORMAT_R16G16B16A16_SNORM;
-   template.width0 = idct->destination->width0 / 4;
-   template.height0 = idct->destination->height0;
-   template.depth0 = 1;
-   template.usage = PIPE_USAGE_STREAM;
-   idct->textures.individual.source = idct->pipe->screen->resource_create(idct->pipe->screen, &template);
-
-   template.target = PIPE_TEXTURE_3D;
-   template.format = PIPE_FORMAT_R16G16B16A16_SNORM;
-   template.width0 = idct->destination->width0 / NR_RENDER_TARGETS;
-   template.height0 = idct->destination->height0 / 4;
-   template.depth0 = NR_RENDER_TARGETS;
-   template.usage = PIPE_USAGE_STATIC;
-   idct->textures.individual.intermediate = idct->pipe->screen->resource_create(idct->pipe->screen, &template);
-
-   for (i = 0; i < 4; ++i) {
-      if(idct->textures.all[i] == NULL)
-         return false; /* a texture failed to allocate */
+   assert(idct);
 
-      u_sampler_view_default_template(&sampler_view, idct->textures.all[i], idct->textures.all[i]->format);
-      idct->sampler_views.all[i] = idct->pipe->create_sampler_view(idct->pipe, idct->textures.all[i], &sampler_view);
+   memset(&rs_state, 0, sizeof(rs_state));
+   rs_state.point_size = 1;
+   rs_state.half_pixel_center = true;
+   rs_state.bottom_edge_rule = true;
+   rs_state.depth_clip = 1;
+   idct->rs_state = idct->pipe->create_rasterizer_state(idct->pipe, &rs_state);
+   if (!idct->rs_state)
+      goto error_rs_state;
+
+   memset(&blend, 0, sizeof blend);
+
+   blend.independent_blend_enable = 0;
+   blend.rt[0].blend_enable = 0;
+   blend.rt[0].rgb_func = PIPE_BLEND_ADD;
+   blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].alpha_func = PIPE_BLEND_ADD;
+   blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
+   blend.logicop_enable = 0;
+   blend.logicop_func = PIPE_LOGICOP_CLEAR;
+   /* Needed to allow color writes to FB, even if blending disabled */
+   blend.rt[0].colormask = PIPE_MASK_RGBA;
+   blend.dither = 0;
+   idct->blend = idct->pipe->create_blend_state(idct->pipe, &blend);
+   if (!idct->blend)
+      goto error_blend;
+
+   for (i = 0; i < 2; ++i) {
+      memset(&sampler, 0, sizeof(sampler));
+      sampler.wrap_s = PIPE_TEX_WRAP_REPEAT;
+      sampler.wrap_t = PIPE_TEX_WRAP_REPEAT;
+      sampler.wrap_r = PIPE_TEX_WRAP_REPEAT;
+      sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
+      sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+      sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
+      sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
+      sampler.compare_func = PIPE_FUNC_ALWAYS;
+      sampler.normalized_coords = 1;
+      idct->samplers[i] = idct->pipe->create_sampler_state(idct->pipe, &sampler);
+      if (!idct->samplers[i])
+         goto error_samplers;
    }
 
-   idct->vertex_bufs.individual.quad = vl_vb_upload_quads(idct->pipe, idct->max_blocks);
-
-   if(idct->vertex_bufs.individual.quad.buffer == NULL)
-      return false;
-
-   idct->vertex_bufs.individual.pos.stride = sizeof(struct vertex2f);
-   idct->vertex_bufs.individual.pos.max_index = 4 * idct->max_blocks - 1;
-   idct->vertex_bufs.individual.pos.buffer_offset = 0;
-   idct->vertex_bufs.individual.pos.buffer = pipe_buffer_create
-   (
-      idct->pipe->screen,
-      PIPE_BIND_VERTEX_BUFFER,
-      sizeof(struct vertex2f) * 4 * idct->max_blocks
-   );
-
-   if(idct->vertex_bufs.individual.pos.buffer == NULL)
-      return false;
+   return true;
 
-   /* Rect element */
-   vertex_elems[0].src_offset = 0;
-   vertex_elems[0].instance_divisor = 0;
-   vertex_elems[0].vertex_buffer_index = 0;
-   vertex_elems[0].src_format = PIPE_FORMAT_R32G32_FLOAT;
+error_samplers:
+   for (i = 0; i < 2; ++i)
+      if (idct->samplers[i])
+         idct->pipe->delete_sampler_state(idct->pipe, idct->samplers[i]);
 
-   /* Pos element */
-   vertex_elems[1].src_offset = 0;
-   vertex_elems[1].instance_divisor = 0;
-   vertex_elems[1].vertex_buffer_index = 1;
-   vertex_elems[1].src_format = PIPE_FORMAT_R32G32_FLOAT;
+   idct->pipe->delete_rasterizer_state(idct->pipe, idct->rs_state);
 
-   idct->vertex_elems_state = idct->pipe->create_vertex_elements_state(idct->pipe, 2, vertex_elems);
+error_blend:
+   idct->pipe->delete_blend_state(idct->pipe, idct->blend);
 
-   return true;
+error_rs_state:
+   return false;
 }
 
 static void
-cleanup_buffers(struct vl_idct *idct)
+cleanup_state(struct vl_idct *idct)
 {
    unsigned i;
 
-   assert(idct);
+   for (i = 0; i < 2; ++i)
+      idct->pipe->delete_sampler_state(idct->pipe, idct->samplers[i]);
 
-   for (i = 0; i < 4; ++i) {
-      pipe_sampler_view_reference(&idct->sampler_views.all[i], NULL);
-      pipe_resource_reference(&idct->textures.all[i], NULL);
-   }
+   idct->pipe->delete_rasterizer_state(idct->pipe, idct->rs_state);
+   idct->pipe->delete_blend_state(idct->pipe, idct->blend);
+}
+
+static bool
+init_source(struct vl_idct *idct, struct vl_idct_buffer *buffer)
+{
+   struct pipe_resource *tex;
+   struct pipe_surface surf_templ;
 
-   idct->pipe->delete_vertex_elements_state(idct->pipe, idct->vertex_elems_state);
-   pipe_resource_reference(&idct->vertex_bufs.individual.quad.buffer, NULL);
-   pipe_resource_reference(&idct->vertex_bufs.individual.pos.buffer, NULL);
+   assert(idct && buffer);
+
+   tex = buffer->sampler_views.individual.source->texture;
+
+   buffer->fb_state_mismatch.width = tex->width0;
+   buffer->fb_state_mismatch.height = tex->height0;
+   buffer->fb_state_mismatch.nr_cbufs = 1;
+
+   memset(&surf_templ, 0, sizeof(surf_templ));
+   surf_templ.format = tex->format;
+   surf_templ.u.tex.first_layer = 0;
+   surf_templ.u.tex.last_layer = 0;
+   buffer->fb_state_mismatch.cbufs[0] = idct->pipe->create_surface(idct->pipe, tex, &surf_templ);
+
+   buffer->viewport_mismatch.scale[0] = tex->width0;
+   buffer->viewport_mismatch.scale[1] = tex->height0;
+   buffer->viewport_mismatch.scale[2] = 1;
+   buffer->viewport_mismatch.scale[3] = 1;
+
+   return true;
 }
 
 static void
-init_state(struct vl_idct *idct)
+cleanup_source(struct vl_idct_buffer *buffer)
 {
-   struct pipe_sampler_state sampler;
-   struct pipe_rasterizer_state rs_state;
-   unsigned i;
-
-   idct->viewport[0].scale[0] = idct->textures.individual.intermediate->width0;
-   idct->viewport[0].scale[1] = idct->textures.individual.intermediate->height0;
+   assert(buffer);
 
-   idct->viewport[1].scale[0] = idct->destination->width0;
-   idct->viewport[1].scale[1] = idct->destination->height0;
+   pipe_surface_reference(&buffer->fb_state_mismatch.cbufs[0], NULL);
 
-   idct->fb_state[0].width = idct->textures.individual.intermediate->width0;
-   idct->fb_state[0].height = idct->textures.individual.intermediate->height0;
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.source, NULL);
+}
 
-   idct->fb_state[0].nr_cbufs = NR_RENDER_TARGETS;
-   for(i = 0; i < NR_RENDER_TARGETS; ++i) {
-      idct->fb_state[0].cbufs[i] = idct->pipe->screen->get_tex_surface(
-         idct->pipe->screen, idct->textures.individual.intermediate, 0, 0, i,
-         PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET);
-   }
+static bool
+init_intermediate(struct vl_idct *idct, struct vl_idct_buffer *buffer)
+{
+   struct pipe_resource *tex;
+   struct pipe_surface surf_templ;
+   unsigned i;
 
-   idct->fb_state[1].width = idct->destination->width0;
-   idct->fb_state[1].height = idct->destination->height0;
+   assert(idct && buffer);
 
-   idct->fb_state[1].nr_cbufs = 1;
-   idct->fb_state[1].cbufs[0] = idct->pipe->screen->get_tex_surface(
-      idct->pipe->screen, idct->destination, 0, 0, 0,
-      PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET);
+   tex = buffer->sampler_views.individual.intermediate->texture;
 
-   for(i = 0; i < 2; ++i) {
-      idct->viewport[i].scale[2] = 1;
-      idct->viewport[i].scale[3] = 1;
-      idct->viewport[i].translate[0] = 0;
-      idct->viewport[i].translate[1] = 0;
-      idct->viewport[i].translate[2] = 0;
-      idct->viewport[i].translate[3] = 0;
+   buffer->fb_state.width = tex->width0;
+   buffer->fb_state.height = tex->height0;
+   buffer->fb_state.nr_cbufs = idct->nr_of_render_targets;
+   for(i = 0; i < idct->nr_of_render_targets; ++i) {
+      memset(&surf_templ, 0, sizeof(surf_templ));
+      surf_templ.format = tex->format;
+      surf_templ.u.tex.first_layer = i;
+      surf_templ.u.tex.last_layer = i;
+      buffer->fb_state.cbufs[i] = idct->pipe->create_surface(
+         idct->pipe, tex, &surf_templ);
 
-      idct->fb_state[i].zsbuf = NULL;
+      if (!buffer->fb_state.cbufs[i])
+         goto error_surfaces;
    }
 
-   for (i = 0; i < 4; ++i) {
-      memset(&sampler, 0, sizeof(sampler));
-      sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
-      sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
-      sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
-      sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
-      sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
-      sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
-      sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
-      sampler.compare_func = PIPE_FUNC_ALWAYS;
-      sampler.normalized_coords = 1;
-      /*sampler.shadow_ambient = ; */
-      /*sampler.lod_bias = ; */
-      sampler.min_lod = 0;
-      /*sampler.max_lod = ; */
-      /*sampler.border_color[0] = ; */
-      /*sampler.max_anisotropy = ; */
-      idct->samplers.all[i] = idct->pipe->create_sampler_state(idct->pipe, &sampler);
-   }
+   buffer->viewport.scale[0] = tex->width0;
+   buffer->viewport.scale[1] = tex->height0;
+   buffer->viewport.scale[2] = 1;
+   buffer->viewport.scale[3] = 1;
 
-   memset(&rs_state, 0, sizeof(rs_state));
-   /*rs_state.sprite_coord_enable */
-   rs_state.sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
-   rs_state.point_quad_rasterization = true;
-   rs_state.point_size = BLOCK_WIDTH;
-   rs_state.gl_rasterization_rules = false;
-   idct->rs_state = idct->pipe->create_rasterizer_state(idct->pipe, &rs_state);
+   return true;
+
+error_surfaces:
+   for(i = 0; i < idct->nr_of_render_targets; ++i)
+      pipe_surface_reference(&buffer->fb_state.cbufs[i], NULL);
+
+   return false;
 }
 
 static void
-cleanup_state(struct vl_idct *idct)
+cleanup_intermediate(struct vl_idct_buffer *buffer)
 {
    unsigned i;
 
-   for(i = 0; i < NR_RENDER_TARGETS; ++i) {
-      idct->pipe->screen->tex_surface_destroy(idct->fb_state[0].cbufs[i]);
-   }
+   assert(buffer);
 
-   idct->pipe->screen->tex_surface_destroy(idct->fb_state[1].cbufs[0]);
+   for(i = 0; i < PIPE_MAX_COLOR_BUFS; ++i)
+      pipe_surface_reference(&buffer->fb_state.cbufs[i], NULL);
 
-   for (i = 0; i < 4; ++i)
-      idct->pipe->delete_sampler_state(idct->pipe, idct->samplers.all[i]);
-
-   idct->pipe->delete_rasterizer_state(idct->pipe, idct->rs_state);
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.intermediate, NULL);
 }
 
-struct pipe_resource *
-vl_idct_upload_matrix(struct pipe_context *pipe)
+struct pipe_sampler_view *
+vl_idct_upload_matrix(struct pipe_context *pipe, float scale)
 {
-   struct pipe_resource template, *matrix;
+   struct pipe_resource tex_templ, *matrix;
+   struct pipe_sampler_view sv_templ, *sv;
    struct pipe_transfer *buf_transfer;
    unsigned i, j, pitch;
    float *f;
@@ -527,187 +689,174 @@ vl_idct_upload_matrix(struct pipe_context *pipe)
    struct pipe_box rect =
    {
       0, 0, 0,
-      BLOCK_WIDTH,
-      BLOCK_HEIGHT,
+      VL_BLOCK_WIDTH / 4,
+      VL_BLOCK_HEIGHT,
       1
    };
 
-   memset(&template, 0, sizeof(struct pipe_resource));
-   template.target = PIPE_TEXTURE_2D;
-   template.format = PIPE_FORMAT_R32G32B32A32_FLOAT;
-   template.last_level = 0;
-   template.width0 = 2;
-   template.height0 = 8;
-   template.depth0 = 1;
-   template.usage = PIPE_USAGE_IMMUTABLE;
-   template.bind = PIPE_BIND_SAMPLER_VIEW;
-   template.flags = 0;
-
-   matrix = pipe->screen->resource_create(pipe->screen, &template);
-
-   /* matrix */
-   buf_transfer = pipe->get_transfer
-   (
-      pipe, matrix,
-      u_subresource(0, 0),
-      PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
-      &rect
-   );
+   assert(pipe);
+
+   memset(&tex_templ, 0, sizeof(tex_templ));
+   tex_templ.target = PIPE_TEXTURE_2D;
+   tex_templ.format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   tex_templ.last_level = 0;
+   tex_templ.width0 = 2;
+   tex_templ.height0 = 8;
+   tex_templ.depth0 = 1;
+   tex_templ.array_size = 1;
+   tex_templ.usage = PIPE_USAGE_IMMUTABLE;
+   tex_templ.bind = PIPE_BIND_SAMPLER_VIEW;
+   tex_templ.flags = 0;
+
+   matrix = pipe->screen->resource_create(pipe->screen, &tex_templ);
+   if (!matrix)
+      goto error_matrix;
+
+   f = pipe->transfer_map(pipe, matrix, 0,
+                                     PIPE_TRANSFER_WRITE |
+                                     PIPE_TRANSFER_DISCARD_RANGE,
+                                     &rect, &buf_transfer);
+   if (!f)
+      goto error_map;
+
    pitch = buf_transfer->stride / sizeof(float);
 
-   f = pipe->transfer_map(pipe, buf_transfer);
-   for(i = 0; i < BLOCK_HEIGHT; ++i)
-      for(j = 0; j < BLOCK_WIDTH; ++j)
-         f[i * pitch + j] = const_matrix[j][i]; // transpose
+   for(i = 0; i < VL_BLOCK_HEIGHT; ++i)
+      for(j = 0; j < VL_BLOCK_WIDTH; ++j)
+         // transpose and scale
+         f[i * pitch + j] = ((const float (*)[8])const_matrix)[j][i] * scale;
 
    pipe->transfer_unmap(pipe, buf_transfer);
-   pipe->transfer_destroy(pipe, buf_transfer);
 
-   return matrix;
-}
+   memset(&sv_templ, 0, sizeof(sv_templ));
+   u_sampler_view_default_template(&sv_templ, matrix, matrix->format);
+   sv = pipe->create_sampler_view(pipe, matrix, &sv_templ);
+   pipe_resource_reference(&matrix, NULL);
+   if (!sv)
+      goto error_map;
 
-static void
-xfer_buffers_map(struct vl_idct *idct)
-{
-   struct pipe_box rect =
-   {
-      0, 0, 0,
-      idct->textures.individual.source->width0,
-      idct->textures.individual.source->height0,
-      1
-   };
+   return sv;
 
-   idct->tex_transfer = idct->pipe->get_transfer
-   (
-      idct->pipe, idct->textures.individual.source,
-      u_subresource(0, 0),
-      PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
-      &rect
-   );
-
-   idct->texels = idct->pipe->transfer_map(idct->pipe, idct->tex_transfer);
-}
+error_map:
+   pipe_resource_reference(&matrix, NULL);
 
-static void
-xfer_buffers_unmap(struct vl_idct *idct)
-{
-   idct->pipe->transfer_unmap(idct->pipe, idct->tex_transfer);
-   idct->pipe->transfer_destroy(idct->pipe, idct->tex_transfer);
+error_matrix:
+   return NULL;
 }
 
-bool
-vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe, struct pipe_resource *dst, struct pipe_resource *matrix)
+bool vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
+                  unsigned buffer_width, unsigned buffer_height,
+                  unsigned nr_of_render_targets,
+                  struct pipe_sampler_view *matrix,
+                  struct pipe_sampler_view *transpose)
 {
-   assert(idct && pipe && dst);
+   assert(idct && pipe);
+   assert(matrix && transpose);
 
    idct->pipe = pipe;
-   pipe_resource_reference(&idct->textures.individual.matrix, matrix);
-   pipe_resource_reference(&idct->textures.individual.transpose, matrix);
-   pipe_resource_reference(&idct->destination, dst);
+   idct->buffer_width = buffer_width;
+   idct->buffer_height = buffer_height;
+   idct->nr_of_render_targets = nr_of_render_targets;
 
-   idct->max_blocks =
-      align(idct->destination->width0, BLOCK_WIDTH) / BLOCK_WIDTH *
-      align(idct->destination->height0, BLOCK_HEIGHT) / BLOCK_HEIGHT *
-      idct->destination->depth0;
+   pipe_sampler_view_reference(&idct->matrix, matrix);
+   pipe_sampler_view_reference(&idct->transpose, transpose);
 
-   if(!init_buffers(idct))
+   if(!init_shaders(idct))
       return false;
 
-   if(!init_shaders(idct)) {
-      cleanup_buffers(idct);
-      return false;
-   }
-
-   if(!vl_vb_init(&idct->blocks, idct->max_blocks)) {
+   if(!init_state(idct)) {
       cleanup_shaders(idct);
-      cleanup_buffers(idct);
       return false;
    }
 
-   init_state(idct);
-
-   xfer_buffers_map(idct);
-
    return true;
 }
 
 void
 vl_idct_cleanup(struct vl_idct *idct)
 {
-   vl_vb_cleanup(&idct->blocks);
    cleanup_shaders(idct);
-   cleanup_buffers(idct);
-
    cleanup_state(idct);
 
-   pipe_resource_reference(&idct->destination, NULL);
+   pipe_sampler_view_reference(&idct->matrix, NULL);
+   pipe_sampler_view_reference(&idct->transpose, NULL);
 }
 
-void
-vl_idct_add_block(struct vl_idct *idct, unsigned x, unsigned y, short *block)
+bool
+vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
+                    struct pipe_sampler_view *source,
+                    struct pipe_sampler_view *intermediate)
 {
-   unsigned tex_pitch;
-   short *texels;
+   assert(buffer && idct);
+   assert(source && intermediate);
 
-   unsigned i;
+   memset(buffer, 0, sizeof(struct vl_idct_buffer));
 
-   assert(idct);
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.matrix, idct->matrix);
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.source, source);
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.transpose, idct->transpose);
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.intermediate, intermediate);
 
-   tex_pitch = idct->tex_transfer->stride / sizeof(short);
-   texels = idct->texels + y * tex_pitch * BLOCK_HEIGHT + x * BLOCK_WIDTH;
+   if (!init_source(idct, buffer))
+      return false;
 
-   for (i = 0; i < BLOCK_HEIGHT; ++i)
-      memcpy(texels + i * tex_pitch, block + i * BLOCK_WIDTH, BLOCK_WIDTH * sizeof(short));
+   if (!init_intermediate(idct, buffer))
+      return false;
 
-   vl_vb_add_block(&idct->blocks, x, y);
+   return true;
 }
 
 void
-vl_idct_flush(struct vl_idct *idct)
+vl_idct_cleanup_buffer(struct vl_idct_buffer *buffer)
 {
-   struct pipe_transfer *vec_transfer;
-   struct quadf *vectors;
-   unsigned num_blocks;
+   assert(buffer);
 
-   assert(idct);
+   cleanup_source(buffer);
+   cleanup_intermediate(buffer);
 
-   vectors = pipe_buffer_map
-   (
-      idct->pipe,
-      idct->vertex_bufs.individual.pos.buffer,
-      PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
-      &vec_transfer
-   );
-
-   num_blocks = vl_vb_upload(&idct->blocks, vectors);
-
-   pipe_buffer_unmap(idct->pipe, idct->vertex_bufs.individual.pos.buffer, vec_transfer);
-
-   xfer_buffers_unmap(idct);
-
-   if(num_blocks > 0) {
-
-      idct->pipe->bind_rasterizer_state(idct->pipe, idct->rs_state);
-      idct->pipe->set_vertex_buffers(idct->pipe, 2, idct->vertex_bufs.all);
-      idct->pipe->bind_vertex_elements_state(idct->pipe, idct->vertex_elems_state);
-      idct->pipe->bind_vs_state(idct->pipe, idct->vs);
-
-      /* first stage */
-      idct->pipe->set_framebuffer_state(idct->pipe, &idct->fb_state[0]);
-      idct->pipe->set_viewport_state(idct->pipe, &idct->viewport[0]);
-      idct->pipe->set_fragment_sampler_views(idct->pipe, 2, idct->sampler_views.stage[0]);
-      idct->pipe->bind_fragment_sampler_states(idct->pipe, 2, idct->samplers.stage[0]);
-      idct->pipe->bind_fs_state(idct->pipe, idct->matrix_fs);
-      util_draw_arrays(idct->pipe, PIPE_PRIM_QUADS, 0, num_blocks * 4);
-
-      /* second stage */
-      idct->pipe->set_framebuffer_state(idct->pipe, &idct->fb_state[1]);
-      idct->pipe->set_viewport_state(idct->pipe, &idct->viewport[1]);
-      idct->pipe->set_fragment_sampler_views(idct->pipe, 2, idct->sampler_views.stage[1]);
-      idct->pipe->bind_fragment_sampler_states(idct->pipe, 2, idct->samplers.stage[1]);
-      idct->pipe->bind_fs_state(idct->pipe, idct->transpose_fs);
-      util_draw_arrays(idct->pipe, PIPE_PRIM_QUADS, 0, num_blocks * 4);
-   }
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.matrix, NULL);
+   pipe_sampler_view_reference(&buffer->sampler_views.individual.transpose, NULL);
+}
+
+void
+vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_instances)
+{
+   assert(buffer);
+
+   idct->pipe->bind_rasterizer_state(idct->pipe, idct->rs_state);
+   idct->pipe->bind_blend_state(idct->pipe, idct->blend);
+
+   idct->pipe->bind_sampler_states(idct->pipe, PIPE_SHADER_FRAGMENT,
+                                   0, 2, idct->samplers);
+
+   idct->pipe->set_sampler_views(idct->pipe, PIPE_SHADER_FRAGMENT, 0, 2,
+                                 buffer->sampler_views.stage[0]);
+
+   /* mismatch control */
+   idct->pipe->set_framebuffer_state(idct->pipe, &buffer->fb_state_mismatch);
+   idct->pipe->set_viewport_states(idct->pipe, 0, 1, &buffer->viewport_mismatch);
+   idct->pipe->bind_vs_state(idct->pipe, idct->vs_mismatch);
+   idct->pipe->bind_fs_state(idct->pipe, idct->fs_mismatch);
+   util_draw_arrays_instanced(idct->pipe, PIPE_PRIM_POINTS, 0, 1, 0, num_instances);
+
+   /* first stage */
+   idct->pipe->set_framebuffer_state(idct->pipe, &buffer->fb_state);
+   idct->pipe->set_viewport_states(idct->pipe, 0, 1, &buffer->viewport);
+   idct->pipe->bind_vs_state(idct->pipe, idct->vs);
+   idct->pipe->bind_fs_state(idct->pipe, idct->fs);
+   util_draw_arrays_instanced(idct->pipe, PIPE_PRIM_QUADS, 0, 4, 0, num_instances);
+}
 
-   xfer_buffers_map(idct);
+void
+vl_idct_prepare_stage2(struct vl_idct *idct, struct vl_idct_buffer *buffer)
+{
+   assert(buffer);
+
+   /* second stage */
+   idct->pipe->bind_rasterizer_state(idct->pipe, idct->rs_state);
+   idct->pipe->bind_sampler_states(idct->pipe, PIPE_SHADER_FRAGMENT,
+                                   0, 2, idct->samplers);
+   idct->pipe->set_sampler_views(idct->pipe, PIPE_SHADER_FRAGMENT,
+                                 0, 2, buffer->sampler_views.stage[1]);
 }
+