st/vega: Overhaul renderer with renderer states.

Renderer states are high-level states to perform specific tasks.  The
renderer is initially in INIT state.  In that state, the renderer is
used for OpenVG pipeline.

This commit adds a new COPY state to the renderer.  The state is used
for copying between two pipe resources using textured drawing.  It can
be used for vgCopyImage, for example.

Rather than modifying every user of the renderer, this commit instead
modifies renderer_copy_texture to use the COPY state internally.

2 files changed, 496 insertions, 254 deletions

diff --git a/src/gallium/state_trackers/vega/renderer.c b/src/gallium/state_trackers/vega/renderer.c
index c6f5f7a05b8..c94f00395b7 100644
--- a/src/gallium/state_trackers/vega/renderer.c
+++ b/src/gallium/state_trackers/vega/renderer.c
@@ -1,6 +1,7 @@
 /**************************************************************************
  *
  * Copyright 2009 VMware, Inc.  All Rights Reserved.
+ * Copyright 2010 LunarG, Inc.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
@@ -40,6 +41,26 @@
 #include "util/u_sampler.h"
 
 #include "cso_cache/cso_context.h"
+#include "tgsi/tgsi_ureg.h"
+
+typedef enum {
+   RENDERER_STATE_INIT,
+   RENDERER_STATE_COPY,
+   NUM_RENDERER_STATES
+} RendererState;
+
+typedef enum {
+   RENDERER_VS_PLAIN,
+   RENDERER_VS_COLOR,
+   RENDERER_VS_TEXTURE,
+   NUM_RENDERER_VS
+} RendererVs;
+
+typedef enum {
+   RENDERER_FS_COLOR,
+   RENDERER_FS_TEXTURE,
+   NUM_RENDERER_FS
+} RendererFs;
 
 struct renderer {
    struct pipe_context *pipe;
@@ -50,8 +71,390 @@ struct renderer {
    void *fs;
 
    VGfloat vertices[4][2][4];
+
+   void *cached_vs[NUM_RENDERER_VS];
+   void *cached_fs[NUM_RENDERER_FS];
+
+   RendererState state;
+
+   /* state data */
+   union {
+      struct {
+         VGint tex_width;
+         VGint tex_height;
+      } copy;
+   } u;
 };
 
+/**
+ * Return VG_TRUE if the renderer can use the resource as the asked bindings.
+ */
+static VGboolean renderer_can_support(struct renderer *renderer,
+                                      struct pipe_resource *res,
+                                      unsigned bindings)
+{
+   struct pipe_screen *screen = renderer->pipe->screen;
+
+   return screen->is_format_supported(screen,
+         res->format, res->target, 0, bindings, 0);
+}
+
+/**
+ * Create a simple vertex shader that passes through position and the given
+ * attribute.
+ */
+static void *create_passthrough_vs(struct pipe_context *pipe, int semantic_name)
+{
+   struct ureg_program *ureg;
+   struct ureg_src src[2], constants[2];
+   struct ureg_dst dst[2], tmp;
+   int i;
+
+   ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
+   if (!ureg)
+      return NULL;
+
+   /* position in surface coordinates */
+   src[0] = ureg_DECL_vs_input(ureg, 0);
+   dst[0] = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
+   tmp = ureg_DECL_temporary(ureg);
+   for (i = 0; i < 2; i++)
+      constants[i] = ureg_DECL_constant(ureg, i);
+
+   /* transform to clipped coordinates */
+   ureg_MUL(ureg, tmp, src[0], constants[0]);
+   ureg_ADD(ureg, tmp, ureg_src(tmp), constants[1]);
+   ureg_MOV(ureg, dst[0], ureg_src(tmp));
+
+   if (semantic_name >= 0) {
+      src[1] = ureg_DECL_vs_input(ureg, 1);
+      dst[1] = ureg_DECL_output(ureg, semantic_name, 0);
+      ureg_MOV(ureg, dst[1], src[1]);
+   }
+
+   ureg_END(ureg);
+
+   return ureg_create_shader_and_destroy(ureg, pipe);
+}
+
+/**
+ * Set renderer vertex shader.
+ *
+ * This function modifies vertex_shader state.
+ */
+static void renderer_set_vs(struct renderer *r, RendererVs id)
+{
+   /* create as needed */
+   if (!r->cached_vs[id]) {
+      int semantic_name = -1;
+
+      switch (id) {
+      case RENDERER_VS_PLAIN:
+         break;
+      case RENDERER_VS_COLOR:
+         semantic_name = TGSI_SEMANTIC_COLOR;
+         break;
+      case RENDERER_VS_TEXTURE:
+         semantic_name = TGSI_SEMANTIC_GENERIC;
+         break;
+      default:
+         assert(!"Unknown renderer vs id");
+         break;
+      }
+
+      r->cached_vs[id] = create_passthrough_vs(r->pipe, semantic_name);
+   }
+
+   cso_set_vertex_shader_handle(r->cso, r->cached_vs[id]);
+}
+
+/**
+ * Set renderer fragment shader.
+ *
+ * This function modifies fragment_shader state.
+ */
+static void renderer_set_fs(struct renderer *r, RendererFs id)
+{
+   /* create as needed */
+   if (!r->cached_fs[id]) {
+      void *fs = NULL;
+
+      switch (id) {
+      case RENDERER_FS_COLOR:
+         fs = util_make_fragment_passthrough_shader(r->pipe);
+         break;
+      case RENDERER_FS_TEXTURE:
+         fs = util_make_fragment_tex_shader(r->pipe,
+               TGSI_TEXTURE_2D, TGSI_INTERPOLATE_LINEAR);
+         break;
+      default:
+         assert(!"Unknown renderer fs id");
+         break;
+      }
+
+      r->cached_fs[id] = fs;
+   }
+
+   cso_set_fragment_shader_handle(r->cso, r->cached_fs[id]);
+}
+
+/**
+ * Set renderer target.
+ *
+ * This function modifies framebuffer and viewport states.
+ */
+static void renderer_set_target(struct renderer *r,
+                                struct pipe_surface *cbuf,
+                                struct pipe_surface *zsbuf,
+                                VGboolean y0_top)
+{
+   struct pipe_framebuffer_state fb;
+
+   memset(&fb, 0, sizeof(fb));
+   fb.width = cbuf->width;
+   fb.height = cbuf->height;
+   fb.cbufs[0] = cbuf;
+   fb.nr_cbufs = 1;
+   fb.zsbuf = zsbuf;
+   cso_set_framebuffer(r->cso, &fb);
+
+   vg_set_viewport(r->owner, (y0_top) ? VEGA_Y0_TOP : VEGA_Y0_BOTTOM);
+}
+
+/**
+ * Set renderer blend state.  Blending is disabled.
+ *
+ * This function modifies blend state.
+ */
+static void renderer_set_blend(struct renderer *r,
+                               VGbitfield channel_mask)
+{
+   struct pipe_blend_state blend;
+
+   memset(&blend, 0, sizeof(blend));
+
+   blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
+   blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
+
+   if (channel_mask & VG_RED)
+      blend.rt[0].colormask |= PIPE_MASK_R;
+   if (channel_mask & VG_GREEN)
+      blend.rt[0].colormask |= PIPE_MASK_G;
+   if (channel_mask & VG_BLUE)
+      blend.rt[0].colormask |= PIPE_MASK_B;
+   if (channel_mask & VG_ALPHA)
+      blend.rt[0].colormask |= PIPE_MASK_A;
+
+   cso_set_blend(r->cso, &blend);
+}
+
+/**
+ * Set renderer sampler and view states.
+ *
+ * This function modifies samplers and fragment_sampler_views states.
+ */
+static void renderer_set_samplers(struct renderer *r,
+                                  uint num_views,
+                                  struct pipe_sampler_view **views)
+{
+   struct pipe_sampler_state sampler;
+   unsigned tex_filter = PIPE_TEX_FILTER_NEAREST;
+   unsigned tex_wrap = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   uint i;
+
+   memset(&sampler, 0, sizeof(sampler));
+
+   sampler.min_img_filter = tex_filter;
+   sampler.mag_img_filter = tex_filter;
+   sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+
+   sampler.wrap_s = tex_wrap;
+   sampler.wrap_t = tex_wrap;
+   sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+
+   sampler.normalized_coords = 1;
+
+   /* set samplers */
+   for (i = 0; i < num_views; i++)
+      cso_single_sampler(r->cso, i, &sampler);
+   cso_single_sampler_done(r->cso);
+
+   /* set views */
+   cso_set_fragment_sampler_views(r->cso, num_views, views);
+}
+
+/**
+ * Setup renderer quad position.
+ */
+static void renderer_quad_pos(struct renderer *r,
+                              VGfloat x0, VGfloat y0,
+                              VGfloat x1, VGfloat y1,
+                              VGboolean scissor)
+{
+   VGfloat z;
+
+   /* the depth test is used for scissoring */
+   z = (scissor) ? 0.0f : 1.0f;
+
+   /* positions */
+   r->vertices[0][0][0] = x0;
+   r->vertices[0][0][1] = y0;
+   r->vertices[0][0][2] = z;
+
+   r->vertices[1][0][0] = x1;
+   r->vertices[1][0][1] = y0;
+   r->vertices[1][0][2] = z;
+
+   r->vertices[2][0][0] = x1;
+   r->vertices[2][0][1] = y1;
+   r->vertices[2][0][2] = z;
+
+   r->vertices[3][0][0] = x0;
+   r->vertices[3][0][1] = y1;
+   r->vertices[3][0][2] = z;
+}
+
+/**
+ * Setup renderer quad texture coordinates.
+ */
+static void renderer_quad_texcoord(struct renderer *r,
+                                   VGfloat x0, VGfloat y0,
+                                   VGfloat x1, VGfloat y1,
+                                   VGint tex_width, VGint tex_height)
+{
+   VGfloat s0, t0, s1, t1, r0, q0;
+   VGint i;
+
+   s0 = x0 / tex_width;
+   s1 = x1 / tex_width;
+   t0 = y0 / tex_height;
+   t1 = y1 / tex_height;
+   r0 = 0.0f;
+   q0 = 1.0f;
+
+   /* texcoords */
+   r->vertices[0][1][0] = s0;
+   r->vertices[0][1][1] = t0;
+
+   r->vertices[1][1][0] = s1;
+   r->vertices[1][1][1] = t0;
+
+   r->vertices[2][1][0] = s1;
+   r->vertices[2][1][1] = t1;
+
+   r->vertices[3][1][0] = s0;
+   r->vertices[3][1][1] = t1;
+
+   for (i = 0; i < 4; i++) {
+      r->vertices[i][1][2] = r0;
+      r->vertices[i][1][3] = q0;
+   }
+}
+
+/**
+ * Draw renderer quad.
+ */
+static void renderer_quad_draw(struct renderer *r)
+{
+   struct pipe_resource *buf;
+
+   buf = pipe_user_buffer_create(r->pipe->screen,
+                                 r->vertices,
+                                 sizeof(r->vertices),
+                                 PIPE_BIND_VERTEX_BUFFER);
+   if (buf) {
+      cso_set_vertex_elements(r->cso, 2, r->owner->velems);
+      util_draw_vertex_buffer(r->pipe, buf, 0,
+                              PIPE_PRIM_TRIANGLE_FAN,
+                              Elements(r->vertices),     /* verts */
+                              Elements(r->vertices[0])); /* attribs/vert */
+
+      pipe_resource_reference(&buf, NULL);
+   }
+}
+
+/**
+ * Prepare the renderer for copying.
+ */
+VGboolean renderer_copy_begin(struct renderer *renderer,
+                              struct pipe_surface *dst,
+                              VGboolean y0_top,
+                              struct pipe_sampler_view *src)
+{
+   assert(renderer->state == RENDERER_STATE_INIT);
+
+   /* sanity check */
+   if (!renderer_can_support(renderer,
+            dst->texture, PIPE_BIND_RENDER_TARGET) ||
+       !renderer_can_support(renderer,
+          src->texture, PIPE_BIND_SAMPLER_VIEW))
+      return VG_FALSE;
+
+   cso_save_framebuffer(renderer->cso);
+   cso_save_viewport(renderer->cso);
+   cso_save_blend(renderer->cso);
+   cso_save_samplers(renderer->cso);
+   cso_save_fragment_sampler_views(renderer->cso);
+   cso_save_fragment_shader(renderer->cso);
+   cso_save_vertex_shader(renderer->cso);
+
+   renderer_set_target(renderer, dst, NULL, y0_top);
+
+   renderer_set_blend(renderer, ~0);
+   renderer_set_samplers(renderer, 1, &src);
+
+   renderer_set_fs(renderer, RENDERER_FS_TEXTURE);
+   renderer_set_vs(renderer, RENDERER_VS_TEXTURE);
+
+   /* remember the texture size */
+   renderer->u.copy.tex_width = src->texture->width0;
+   renderer->u.copy.tex_height = src->texture->height0;
+   renderer->state = RENDERER_STATE_COPY;
+
+   return VG_TRUE;
+}
+
+/**
+ * Draw into the destination rectangle given by (x, y, w, h).  The texture is
+ * sampled from within the rectangle given by (sx, sy, sw, sh).
+ *
+ * The coordinates are in surface coordinates.
+ */
+void renderer_copy(struct renderer *renderer,
+                   VGint x, VGint y, VGint w, VGint h,
+                   VGint sx, VGint sy, VGint sw, VGint sh)
+{
+   assert(renderer->state == RENDERER_STATE_COPY);
+
+   /* there is no depth buffer for scissoring anyway */
+   renderer_quad_pos(renderer, x, y, x + w, y + h, VG_FALSE);
+   renderer_quad_texcoord(renderer, sx, sy, sx + sw, sy + sh,
+         renderer->u.copy.tex_width,
+         renderer->u.copy.tex_height);
+
+   renderer_quad_draw(renderer);
+}
+
+/**
+ * End copying and restore the states.
+ */
+void renderer_copy_end(struct renderer *renderer)
+{
+   assert(renderer->state == RENDERER_STATE_COPY);
+
+   cso_restore_framebuffer(renderer->cso);
+   cso_restore_viewport(renderer->cso);
+   cso_restore_blend(renderer->cso);
+   cso_restore_samplers(renderer->cso);
+   cso_restore_fragment_sampler_views(renderer->cso);
+   cso_restore_fragment_shader(renderer->cso);
+   cso_restore_vertex_shader(renderer->cso);
+
+   renderer->state = RENDERER_STATE_INIT;
+}
+
 static void setup_shaders(struct renderer *ctx)
 {
    struct pipe_context *pipe = ctx->pipe;
@@ -94,80 +497,6 @@ setup_vertex_data(struct renderer *ctx,
 				   PIPE_BIND_VERTEX_BUFFER);
 }
 
-static struct pipe_resource *
-setup_vertex_data_tex(struct renderer *ctx,
-                      float x0, float y0, float x1, float y1,
-                      float s0, float t0, float s1, float t1,
-                      float z)
-{
-   ctx->vertices[0][0][0] = x0;
-   ctx->vertices[0][0][1] = y0;
-   ctx->vertices[0][0][2] = z;
-   ctx->vertices[0][1][0] = s0; /*s*/
-   ctx->vertices[0][1][1] = t0; /*t*/
-
-   ctx->vertices[1][0][0] = x1;
-   ctx->vertices[1][0][1] = y0;
-   ctx->vertices[1][0][2] = z;
-   ctx->vertices[1][1][0] = s1; /*s*/
-   ctx->vertices[1][1][1] = t0; /*t*/
-
-   ctx->vertices[2][0][0] = x1;
-   ctx->vertices[2][0][1] = y1;
-   ctx->vertices[2][0][2] = z;
-   ctx->vertices[2][1][0] = s1;
-   ctx->vertices[2][1][1] = t1;
-
-   ctx->vertices[3][0][0] = x0;
-   ctx->vertices[3][0][1] = y1;
-   ctx->vertices[3][0][2] = z;
-   ctx->vertices[3][1][0] = s0;
-   ctx->vertices[3][1][1] = t1;
-
-   return pipe_user_buffer_create( ctx->pipe->screen,
-                                   ctx->vertices,
-                                   sizeof(ctx->vertices),
-				   PIPE_BIND_VERTEX_BUFFER);
-}
-
-
-static struct pipe_resource *
-setup_vertex_data_qtex(struct renderer *ctx,
-                       float x0, float y0, float x1, float y1,
-                       float x2, float y2, float x3, float y3,
-                       float s0, float t0, float s1, float t1,
-                       float z)
-{
-   ctx->vertices[0][0][0] = x0;
-   ctx->vertices[0][0][1] = y0;
-   ctx->vertices[0][0][2] = z;
-   ctx->vertices[0][1][0] = s0; /*s*/
-   ctx->vertices[0][1][1] = t0; /*t*/
-
-   ctx->vertices[1][0][0] = x1;
-   ctx->vertices[1][0][1] = y1;
-   ctx->vertices[1][0][2] = z;
-   ctx->vertices[1][1][0] = s1; /*s*/
-   ctx->vertices[1][1][1] = t0; /*t*/
-
-   ctx->vertices[2][0][0] = x2;
-   ctx->vertices[2][0][1] = y2;
-   ctx->vertices[2][0][2] = z;
-   ctx->vertices[2][1][0] = s1;
-   ctx->vertices[2][1][1] = t1;
-
-   ctx->vertices[3][0][0] = x3;
-   ctx->vertices[3][0][1] = y3;
-   ctx->vertices[3][0][2] = z;
-   ctx->vertices[3][1][0] = s0;
-   ctx->vertices[3][1][1] = t1;
-
-   return pipe_user_buffer_create( ctx->pipe->screen,
-                                   ctx->vertices,
-                                   sizeof(ctx->vertices),
-				   PIPE_BIND_VERTEX_BUFFER);
-}
-
 struct renderer * renderer_create(struct vg_context *owner)
 {
    VGint i;
@@ -183,17 +512,27 @@ struct renderer * renderer_create(struct vg_context *owner)
    setup_shaders(renderer);
 
    /* init vertex data that doesn't change */
-   for (i = 0; i < 4; i++) {
+   for (i = 0; i < 4; i++)
       renderer->vertices[i][0][3] = 1.0f; /* w */
-      renderer->vertices[i][1][2] = 0.0f; /* r */
-      renderer->vertices[i][1][3] = 1.0f; /* q */
-   }
+
+   renderer->state = RENDERER_STATE_INIT;
 
    return renderer;
 }
 
 void renderer_destroy(struct renderer *ctx)
 {
+   int i;
+
+   for (i = 0; i < NUM_RENDERER_VS; i++) {
+      if (ctx->cached_vs[i])
+         cso_delete_vertex_shader(ctx->cso, ctx->cached_vs[i]);
+   }
+   for (i = 0; i < NUM_RENDERER_FS; i++) {
+      if (ctx->cached_fs[i])
+         cso_delete_fragment_shader(ctx->cso, ctx->cached_fs[i]);
+   }
+
 #if 0
    if (ctx->fs) {
       cso_delete_fragment_shader(ctx->cso, ctx->fs);
@@ -208,20 +547,11 @@ void renderer_draw_quad(struct renderer *r,
                         VGfloat x2, VGfloat y2,
                         VGfloat depth)
 {
-   struct pipe_resource *buf;
+   assert(r->state == RENDERER_STATE_INIT);
+   assert(floatsEqual(depth, 0.0f));
 
-   buf = setup_vertex_data(r, x1, y1, x2, y2, depth);
-
-   if (buf) {
-      cso_set_vertex_elements(r->cso, 2, r->owner->velems);
-      util_draw_vertex_buffer(r->pipe, buf, 0,
-                              PIPE_PRIM_TRIANGLE_FAN,
-                              4,  /* verts */
-                              2); /* attribs/vert */
-
-      pipe_resource_reference( &buf,
-                             NULL );
-   }
+   renderer_quad_pos(r, x1, y1, x2, y2, VG_TRUE);
+   renderer_quad_draw(r);
 }
 
 void renderer_draw_texture(struct renderer *r,
@@ -231,36 +561,18 @@ void renderer_draw_texture(struct renderer *r,
                            VGfloat x1, VGfloat y1,
                            VGfloat x2, VGfloat y2)
 {
-   struct pipe_context *pipe = r->pipe;
-   struct pipe_resource *buf;
-   VGfloat s0, t0, s1, t1;
-
+   assert(r->state == RENDERER_STATE_INIT);
    assert(tex->width0 != 0);
    assert(tex->height0 != 0);
 
-   s0 = x1offset / tex->width0;
-   s1 = x2offset / tex->width0;
-   t0 = y1offset / tex->height0;
-   t1 = y2offset / tex->height0;
-
    cso_save_vertex_shader(r->cso);
-   /* shaders */
-   cso_set_vertex_shader_handle(r->cso, vg_texture_vs(r->owner));
 
-   /* draw quad */
-   buf = setup_vertex_data_tex(r, x1, y1, x2, y2,
-                               s0, t0, s1, t1, 0.0f);
+   renderer_set_vs(r, RENDERER_VS_TEXTURE);
 
-   if (buf) {
-      cso_set_vertex_elements(r->cso, 2, r->owner->velems);
-      util_draw_vertex_buffer(pipe, buf, 0,
-                           PIPE_PRIM_TRIANGLE_FAN,
-                           4,  /* verts */
-                           2); /* attribs/vert */
-
-      pipe_resource_reference( &buf,
-                             NULL );
-   }
+   renderer_quad_pos(r, x1, y1, x2, y2, VG_TRUE);
+   renderer_quad_texcoord(r, x1offset, y1offset,
+         x2offset, y2offset, tex->width0, tex->height0);
+   renderer_quad_draw(r);
 
    cso_restore_vertex_shader(r->cso);
 }
@@ -273,129 +585,45 @@ void renderer_copy_texture(struct renderer *ctx,
                            VGfloat dx1, VGfloat dy1,
                            VGfloat dx2, VGfloat dy2)
 {
-   struct pipe_context *pipe = ctx->pipe;
-   struct pipe_screen *screen = pipe->screen;
-   struct pipe_resource *tex = src->texture;
-   struct pipe_resource *buf;
-   struct pipe_surface *dst_surf = screen->get_tex_surface(
-      screen, dst, 0, 0, 0,
-      PIPE_BIND_RENDER_TARGET);
-   struct pipe_framebuffer_state fb;
-   float s0, t0, s1, t1;
+   struct pipe_surface *surf;
+   VGint x, y, w, h, sx, sy, sw, sh;
 
-   assert(tex->width0 != 0);
-   assert(tex->height0 != 0);
+   /* get the destination surface */
+   surf = ctx->pipe->screen->get_tex_surface(ctx->pipe->screen,
+         dst, 0, 0, 0, PIPE_BIND_RENDER_TARGET);
+   if (!surf)
+      return;
+
+   assert(ctx->state == RENDERER_STATE_INIT);
+   assert(src->texture->width0 != 0);
+   assert(src->texture->height0 != 0);
    assert(dst->width0 != 0);
    assert(dst->height0 != 0);
 
-#if 0
-   debug_printf("copy texture [%f, %f, %f, %f], [%f, %f, %f, %f]\n",
-                sx1, sy1, sx2, sy2, dx1, dy1, dx2, dy2);
-#endif
-
-#if 1
-   s0 = sx1 / tex->width0;
-   s1 = sx2 / tex->width0;
-   t0 = sy1 / tex->height0;
-   t1 = sy2 / tex->height0;
-#else
-   s0 = 0;
-   s1 = 1;
-   t0 = 0;
-   t1 = 1;
-#endif
-
-   assert(screen->is_format_supported(screen, dst_surf->format, PIPE_TEXTURE_2D,
-                                      0, PIPE_BIND_RENDER_TARGET, 0));
-
-   /* save state (restored below) */
-   cso_save_blend(ctx->cso);
-   cso_save_samplers(ctx->cso);
-   cso_save_fragment_sampler_views(ctx->cso);
-   cso_save_framebuffer(ctx->cso);
-   cso_save_fragment_shader(ctx->cso);
-   cso_save_vertex_shader(ctx->cso);
-
-   cso_save_viewport(ctx->cso);
-
-
-   /* set misc state we care about */
-   {
-      struct pipe_blend_state blend;
-      memset(&blend, 0, sizeof(blend));
-      blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
-      blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
-      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
-      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
-      blend.rt[0].colormask = PIPE_MASK_RGBA;
-      cso_set_blend(ctx->cso, &blend);
-   }
-
-   /* sampler */
-   {
-      struct pipe_sampler_state sampler;
-      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_mip_filter = PIPE_TEX_MIPFILTER_NONE;
-      sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
-      sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
-      sampler.normalized_coords = 1;
-      cso_single_sampler(ctx->cso, 0, &sampler);
-      cso_single_sampler_done(ctx->cso);
-   }
-
-   vg_set_viewport(ctx->owner, VEGA_Y0_TOP);
-
-   /* texture */
-   cso_set_fragment_sampler_views(ctx->cso, 1, &src);
-
-   /* shaders */
-   cso_set_vertex_shader_handle(ctx->cso, vg_texture_vs(ctx->owner));
-   cso_set_fragment_shader_handle(ctx->cso, ctx->fs);
-
-   /* drawing dest */
-   memset(&fb, 0, sizeof(fb));
-   fb.width = dst_surf->width;
-   fb.height = dst_surf->height;
-   fb.nr_cbufs = 1;
-   fb.cbufs[0] = dst_surf;
-   {
-      VGint i;
-      for (i = 1; i < PIPE_MAX_COLOR_BUFS; ++i)
-         fb.cbufs[i] = 0;
-   }
-   cso_set_framebuffer(ctx->cso, &fb);
-
-   /* draw quad */
-   buf = setup_vertex_data_tex(ctx,
-                         dx1, dy1,
-                         dx2, dy2,
-                         s0, t0, s1, t1,
-                         0.0f);
-
-   if (buf) {
-      cso_set_vertex_elements(ctx->cso, 2, ctx->owner->velems);
-      util_draw_vertex_buffer(ctx->pipe, buf, 0,
-                              PIPE_PRIM_TRIANGLE_FAN,
-                              4,  /* verts */
-                              2); /* attribs/vert */
-
-      pipe_resource_reference( &buf,
-                             NULL );
+   x = (VGint) dx1;
+   y = (VGint) dy1;
+   w = (VGint) (dx2 - dx1);
+   h = (VGint) (dy2 - dy1);
+   assert(floatsEqual(x, dx1) &&
+          floatsEqual(y, dy1) &&
+          floatsEqual(w, (dx2 - dx1)) &&
+          floatsEqual(h, (dy2 - dy1)));
+
+   sx = (VGint) sx1;
+   sy = (VGint) sy1;
+   sw = (VGint) (sx2 - sx1);
+   sh = (VGint) (sy2 - sy1);
+   assert(floatsEqual(sx, sx1) &&
+          floatsEqual(sy, sy1) &&
+          floatsEqual(sw, (sx2 - sx1)) &&
+          floatsEqual(sh, (sy2 - sy1)));
+
+   if (renderer_copy_begin(ctx, surf, VG_TRUE, src)) {
+      renderer_copy(ctx, x, y, w, h, sx, sy, sw, sh);
+      renderer_copy_end(ctx);
    }
 
-   /* restore state we changed */
-   cso_restore_blend(ctx->cso);
-   cso_restore_samplers(ctx->cso);
-   cso_restore_fragment_sampler_views(ctx->cso);
-   cso_restore_framebuffer(ctx->cso);
-   cso_restore_vertex_shader(ctx->cso);
-   cso_restore_fragment_shader(ctx->cso);
-   cso_restore_viewport(ctx->cso);
-
-   pipe_surface_reference(&dst_surf, NULL);
+   pipe_surface_reference(&surf, NULL);
 }
 
 void renderer_copy_surface(struct renderer *ctx,
@@ -575,36 +803,38 @@ void renderer_texture_quad(struct renderer *r,
                            VGfloat x3, VGfloat y3,
                            VGfloat x4, VGfloat y4)
 {
-   struct pipe_context *pipe = r->pipe;
-   struct pipe_resource *buf;
-   VGfloat s0, t0, s1, t1;
+   const VGfloat z = 0.0f;
 
+   assert(r->state == RENDERER_STATE_INIT);
    assert(tex->width0 != 0);
    assert(tex->height0 != 0);
 
-   s0 = x1offset / tex->width0;
-   s1 = x2offset / tex->width0;
-   t0 = y1offset / tex->height0;
-   t1 = y2offset / tex->height0;
-
    cso_save_vertex_shader(r->cso);
-   /* shaders */
-   cso_set_vertex_shader_handle(r->cso, vg_texture_vs(r->owner));
 
-   /* draw quad */
-   buf = setup_vertex_data_qtex(r, x1, y1, x2, y2, x3, y3, x4, y4,
-                          s0, t0, s1, t1, 0.0f);
+   renderer_set_vs(r, RENDERER_VS_TEXTURE);
 
-   if (buf) {
-      cso_set_vertex_elements(r->cso, 2, r->owner->velems);
-      util_draw_vertex_buffer(pipe, buf, 0,
-                              PIPE_PRIM_TRIANGLE_FAN,
-                              4,  /* verts */
-                              2); /* attribs/vert */
+   /* manually set up positions */
+   r->vertices[0][0][0] = x1;
+   r->vertices[0][0][1] = y1;
+   r->vertices[0][0][2] = z;
 
-      pipe_resource_reference(&buf,
-                            NULL);
-   }
+   r->vertices[1][0][0] = x2;
+   r->vertices[1][0][1] = y2;
+   r->vertices[1][0][2] = z;
+
+   r->vertices[2][0][0] = x3;
+   r->vertices[2][0][1] = y3;
+   r->vertices[2][0][2] = z;
+
+   r->vertices[3][0][0] = x4;
+   r->vertices[3][0][1] = y4;
+   r->vertices[3][0][2] = z;
+
+   /* texcoords */
+   renderer_quad_texcoord(r, x1offset, y1offset,
+         x2offset, y2offset, tex->width0, tex->height0);
+
+   renderer_quad_draw(r);
 
    cso_restore_vertex_shader(r->cso);
 }
diff --git a/src/gallium/state_trackers/vega/renderer.h b/src/gallium/state_trackers/vega/renderer.h
index b1a9fb58be6..ddcc164b46c 100644
--- a/src/gallium/state_trackers/vega/renderer.h
+++ b/src/gallium/state_trackers/vega/renderer.h
@@ -1,6 +1,7 @@
 /**************************************************************************
  *
  * Copyright 2009 VMware, Inc.  All Rights Reserved.
+ * Copyright 2010 LunarG, Inc.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
@@ -39,6 +40,17 @@ struct pipe_surface;
 struct renderer *renderer_create(struct vg_context *owner);
 void renderer_destroy(struct renderer *);
 
+VGboolean renderer_copy_begin(struct renderer *renderer,
+                              struct pipe_surface *dst,
+                              VGboolean y0_top,
+                              struct pipe_sampler_view *src);
+
+void renderer_copy(struct renderer *renderer,
+                   VGint x, VGint y, VGint w, VGint h,
+                   VGint sx, VGint sy, VGint sw, VGint sh);
+
+void renderer_copy_end(struct renderer *renderer);
+
 void renderer_draw_quad(struct renderer *,
                         VGfloat x1, VGfloat y1,
                         VGfloat x2, VGfloat y2,