OpenVG 1.0 State Tracker

Import of the OpenVG 1.0 state tracker for Gallium.

1 files changed, 550 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/vega/polygon.c b/src/gallium/state_trackers/vega/polygon.c
new file mode 100644
index 0000000000..b6d282d803
--- /dev/null
+++ b/src/gallium/state_trackers/vega/polygon.c
@@ -0,0 +1,550 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, 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
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "polygon.h"
+
+#include "matrix.h" /*for floatsEqual*/
+#include "vg_context.h"
+#include "vg_state.h"
+#include "paint.h"
+#include "renderer.h"
+#include "util_array.h"
+#include "VG/openvg.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_state.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_screen.h"
+
+#include "util/u_draw_quad.h"
+#include "util/u_math.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#define DEBUG_POLYGON 0
+
+#define COMPONENTS 2
+
+struct polygon
+{
+   VGfloat *data;
+   VGint    size;
+
+   VGint    num_verts;
+
+   VGboolean dirty;
+   struct pipe_buffer *vbuf;
+   struct pipe_screen *screen;
+};
+
+static float *ptr_to_vertex(float *data, int idx)
+{
+   return data + (idx * COMPONENTS);
+}
+
+#if 0
+static void polygon_print(struct polygon *poly)
+{
+   int i;
+   float *vert;
+   debug_printf("Polygon %p, size = %d\n", poly, poly->num_verts);
+   for (i = 0; i < poly->num_verts; ++i) {
+      vert = ptr_to_vertex(poly->data, i);
+      debug_printf("%f, %f,  ", vert[0], vert[1]);
+   }
+   debug_printf("\nend\n");
+}
+#endif
+
+
+struct polygon * polygon_create(int size)
+{
+   struct polygon *poly = (struct polygon*)malloc(sizeof(struct polygon));
+
+   poly->data = malloc(sizeof(float) * COMPONENTS * size);
+   poly->size = size;
+   poly->num_verts = 0;
+   poly->dirty = VG_TRUE;
+   poly->vbuf = NULL;
+
+   return poly;
+}
+
+struct polygon * polygon_create_from_data(float *data, int size)
+{
+   struct polygon *poly = polygon_create(size);
+
+   memcpy(poly->data, data, sizeof(float) * COMPONENTS * size);
+   poly->num_verts = size;
+   poly->dirty = VG_TRUE;
+   poly->vbuf = NULL;
+
+   return poly;
+}
+
+void polygon_destroy(struct polygon *poly)
+{
+   if (poly->vbuf)
+      pipe_buffer_reference(&poly->vbuf, NULL);
+
+   free(poly->data);
+   free(poly);
+}
+
+void polygon_resize(struct polygon *poly, int new_size)
+{
+   float *data = (float*)malloc(sizeof(float) * COMPONENTS * new_size);
+   int size = MIN2(sizeof(float) * COMPONENTS * new_size,
+                   sizeof(float) * COMPONENTS * poly->size);
+   memcpy(data, poly->data, size);
+   free(poly->data);
+   poly->data = data;
+   poly->size = new_size;
+   poly->dirty = VG_TRUE;
+}
+
+int polygon_size(struct polygon *poly)
+{
+   return poly->size;
+}
+
+int polygon_vertex_count(struct polygon *poly)
+{
+   return poly->num_verts;
+}
+
+float * polygon_data(struct polygon *poly)
+{
+   return poly->data;
+}
+
+void polygon_vertex_append(struct polygon *p,
+                           float x, float y)
+{
+   float *vert;
+#if DEBUG_POLYGON
+   debug_printf("Append vertex [%f, %f]\n", x, y);
+#endif
+   if (p->num_verts >= p->size) {
+      polygon_resize(p, p->size * 2);
+   }
+
+   vert = ptr_to_vertex(p->data, p->num_verts);
+   vert[0] = x;
+   vert[1] = y;
+   ++p->num_verts;
+   p->dirty = VG_TRUE;
+}
+
+void polygon_set_vertex(struct polygon *p, int idx,
+                        float x, float y)
+{
+   float *vert;
+   if (idx >= p->num_verts) {
+      /*fixme: error reporting*/
+      abort();
+      return;
+   }
+
+   vert = ptr_to_vertex(p->data, idx);
+   vert[0] = x;
+   vert[1] = y;
+   p->dirty = VG_TRUE;
+}
+
+void polygon_vertex(struct polygon *p, int idx,
+                    float *vertex)
+{
+   float *vert;
+   if (idx >= p->num_verts) {
+      /*fixme: error reporting*/
+      abort();
+      return;
+   }
+
+   vert = ptr_to_vertex(p->data, idx);
+   vertex[0] = vert[0];
+   vertex[1] = vert[1];
+}
+
+void polygon_bounding_rect(struct polygon *p,
+                           float *rect)
+{
+   int i;
+   float minx, miny, maxx, maxy;
+   float *vert = ptr_to_vertex(p->data, 0);
+   minx = vert[0];
+   maxx = vert[0];
+   miny = vert[1];
+   maxy = vert[1];
+
+   for (i = 1; i < p->num_verts; ++i) {
+      vert = ptr_to_vertex(p->data, i);
+      minx = MIN2(vert[0], minx);
+      miny = MIN2(vert[1], miny);
+
+      maxx = MAX2(vert[0], maxx);
+      maxy = MAX2(vert[1], maxy);
+   }
+
+   rect[0] = minx;
+   rect[1] = miny;
+   rect[2] = maxx - minx;
+   rect[3] = maxy - miny;
+}
+
+int polygon_contains_point(struct polygon *p,
+                           float x, float y)
+{
+   return 0;
+}
+
+void polygon_append_polygon(struct polygon *dst,
+                            struct polygon *src)
+{
+   if (dst->num_verts + src->num_verts >= dst->size) {
+      polygon_resize(dst, dst->num_verts + src->num_verts * 1.5);
+   }
+   memcpy(ptr_to_vertex(dst->data, dst->num_verts),
+          src->data, src->num_verts * COMPONENTS * sizeof(VGfloat));
+   dst->num_verts += src->num_verts;
+}
+
+VGboolean polygon_is_closed(struct polygon *p)
+{
+   VGfloat start[2], end[2];
+
+   polygon_vertex(p, 0, start);
+   polygon_vertex(p, p->num_verts - 1, end);
+
+   return floatsEqual(start[0], end[0]) && floatsEqual(start[1], end[1]);
+}
+
+static void set_blend_for_fill(struct pipe_blend_state *blend)
+{
+   memset(blend, 0, sizeof(struct pipe_blend_state));
+   blend->colormask = 0; /*disable colorwrites*/
+
+   blend->rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend->rgb_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
+   blend->alpha_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
+}
+
+static void draw_polygon(struct vg_context *ctx,
+                         struct polygon *poly)
+{
+   int vert_size;
+   struct pipe_context *pipe;
+   struct pipe_vertex_buffer vbuffer;
+   struct pipe_vertex_element velement;
+
+   vert_size = poly->num_verts * COMPONENTS * sizeof(float);
+
+   /*polygon_print(poly);*/
+
+   pipe = ctx->pipe;
+
+   if (poly->vbuf == NULL || poly->dirty) {
+      if (poly->vbuf) {
+         pipe_buffer_reference(&poly->vbuf,
+                               NULL);
+      }
+      poly->screen = pipe->screen;
+      poly->vbuf= pipe_user_buffer_create(poly->screen,
+                                          poly->data,
+                                          vert_size);
+      poly->dirty = VG_FALSE;
+   }
+
+
+   /* tell pipe about the vertex buffer */
+   memset(&vbuffer, 0, sizeof(vbuffer));
+   vbuffer.buffer = poly->vbuf;
+   vbuffer.stride = COMPONENTS * sizeof(float);  /* vertex size */
+   vbuffer.buffer_offset = 0;
+   vbuffer.max_index = poly->num_verts - 1;
+   pipe->set_vertex_buffers(pipe, 1, &vbuffer);
+
+   /* tell pipe about the vertex attributes */
+   velement.src_offset = 0;
+   velement.vertex_buffer_index = 0;
+   velement.src_format = PIPE_FORMAT_R32G32_FLOAT;
+   velement.nr_components = COMPONENTS;
+   pipe->set_vertex_elements(pipe, 1, &velement);
+
+   /* draw */
+   pipe->draw_arrays(pipe, PIPE_PRIM_TRIANGLE_FAN, 
+                     0, poly->num_verts);
+}
+
+void polygon_fill(struct polygon *poly, struct vg_context *ctx)
+{
+   struct pipe_depth_stencil_alpha_state dsa;
+   struct pipe_blend_state blend;
+   VGfloat bounds[4];
+   VGfloat min_x, min_y, max_x, max_y;
+   assert(poly);
+   polygon_bounding_rect(poly, bounds);
+   min_x = bounds[0];
+   min_y = bounds[1];
+   max_x = bounds[0] + bounds[2];
+   max_y = bounds[1] + bounds[3];
+
+#if DEBUG_POLYGON
+   debug_printf("Poly bounds are [%f, %f], [%f, %f]\n",
+                min_x, min_y, max_x, max_y);
+#endif
+
+   set_blend_for_fill(&blend);
+
+   memset(&dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
+
+   cso_save_blend(ctx->cso_context);
+   cso_save_depth_stencil_alpha(ctx->cso_context);
+
+   dsa.stencil[0].enabled = 1;
+   if (ctx->state.vg.fill_rule == VG_EVEN_ODD) {
+      dsa.stencil[0].writemask = 1;
+      dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+      dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+      dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INVERT;
+      dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
+      dsa.stencil[0].ref_value = 0;
+      dsa.stencil[0].valuemask = ~0;
+
+      cso_set_blend(ctx->cso_context, &blend);
+      cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+      draw_polygon(ctx, poly);
+   } else if (ctx->state.vg.fill_rule == VG_NON_ZERO) {
+      struct pipe_screen *screen = ctx->pipe->screen;
+
+      if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
+         /* front */
+         dsa.stencil[0].writemask = ~0;
+         dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INCR_WRAP;
+         dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
+         dsa.stencil[0].ref_value = 0;
+         dsa.stencil[0].valuemask = ~0;
+
+         /* back */
+         dsa.stencil[1].enabled = 1;
+         dsa.stencil[1].writemask = ~0;
+         dsa.stencil[1].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[1].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[1].zpass_op = PIPE_STENCIL_OP_DECR_WRAP;
+         dsa.stencil[1].func = PIPE_FUNC_ALWAYS;
+         dsa.stencil[1].ref_value = 0;
+         dsa.stencil[1].valuemask = ~0;
+
+         cso_set_blend(ctx->cso_context, &blend);
+         cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+         draw_polygon(ctx, poly);
+      } else {
+         struct pipe_rasterizer_state raster;
+
+         memcpy(&raster, &ctx->state.g3d.rasterizer, sizeof(struct pipe_rasterizer_state));
+
+         cso_save_rasterizer(ctx->cso_context);
+         dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
+         dsa.stencil[0].ref_value = 0;
+         dsa.stencil[0].valuemask = ~0;
+
+         raster.cull_mode = raster.front_winding ^ PIPE_WINDING_BOTH;
+         dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INCR_WRAP;
+
+         cso_set_blend(ctx->cso_context, &blend);
+         cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+         cso_set_rasterizer(ctx->cso_context, &raster);
+         draw_polygon(ctx, poly);
+
+         raster.cull_mode = raster.front_winding;
+         dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_DECR_WRAP;
+         cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+         cso_set_rasterizer(ctx->cso_context, &raster);
+         draw_polygon(ctx, poly);
+
+         cso_restore_rasterizer(ctx->cso_context);
+      }
+   }
+
+   /* restore color writes */
+   cso_restore_blend(ctx->cso_context);
+   /* setup stencil ops */
+   dsa.stencil[0].func = PIPE_FUNC_NOTEQUAL;
+   dsa.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
+   dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
+   dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
+   dsa.stencil[0].ref_value = 0;
+   dsa.stencil[0].valuemask = dsa.stencil[0].writemask;
+   dsa.stencil[1].enabled = 0;
+   memcpy(&dsa.depth, &ctx->state.g3d.dsa.depth,
+          sizeof(struct pipe_depth_state));
+   cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+
+   /* render the quad to propagate the rendering from stencil */
+   renderer_draw_quad(ctx->renderer, min_x, min_y,
+                      max_x, max_y, 0.0f/*depth should be disabled*/);
+
+   cso_restore_depth_stencil_alpha(ctx->cso_context);
+}
+
+void polygon_array_fill(struct polygon_array *polyarray, struct vg_context *ctx)
+{
+   struct array *polys = polyarray->array;
+   struct pipe_depth_stencil_alpha_state dsa;
+   struct pipe_blend_state blend;
+   VGfloat min_x = polyarray->min_x;
+   VGfloat min_y = polyarray->min_y;
+   VGfloat max_x = polyarray->max_x;
+   VGfloat max_y = polyarray->max_y;
+   VGint i;
+
+
+#if DEBUG_POLYGON
+   debug_printf("%s: Poly bounds are [%f, %f], [%f, %f]\n",
+                __FUNCTION__,
+                min_x, min_y, max_x, max_y);
+#endif
+
+   set_blend_for_fill(&blend);
+
+   memset(&dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
+
+   cso_save_blend(ctx->cso_context);
+   cso_save_depth_stencil_alpha(ctx->cso_context);
+
+   dsa.stencil[0].enabled = 1;
+   if (ctx->state.vg.fill_rule == VG_EVEN_ODD) {
+      dsa.stencil[0].writemask = 1;
+      dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+      dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+      dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INVERT;
+      dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
+      dsa.stencil[0].ref_value = 0;
+      dsa.stencil[0].valuemask = ~0;
+
+      cso_set_blend(ctx->cso_context, &blend);
+      cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+      for (i = 0; i < polys->num_elements; ++i) {
+         struct polygon *poly = (((struct polygon**)polys->data)[i]);
+         draw_polygon(ctx, poly);
+      }
+   } else if (ctx->state.vg.fill_rule == VG_NON_ZERO) {
+      struct pipe_screen *screen = ctx->pipe->screen;
+
+      if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
+         /* front */
+         dsa.stencil[0].writemask = ~0;
+         dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INCR_WRAP;
+         dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
+         dsa.stencil[0].ref_value = 0;
+         dsa.stencil[0].valuemask = ~0;
+
+         /* back */
+         dsa.stencil[1].enabled = 1;
+         dsa.stencil[1].writemask = ~0;
+         dsa.stencil[1].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[1].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[1].zpass_op = PIPE_STENCIL_OP_DECR_WRAP;
+         dsa.stencil[1].func = PIPE_FUNC_ALWAYS;
+         dsa.stencil[1].ref_value = 0;
+         dsa.stencil[1].valuemask = ~0;
+
+         cso_set_blend(ctx->cso_context, &blend);
+         cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+         for (i = 0; i < polys->num_elements; ++i) {
+            struct polygon *poly = (((struct polygon**)polys->data)[i]);
+            draw_polygon(ctx, poly);
+         }
+      } else {
+         struct pipe_rasterizer_state raster;
+
+         memcpy(&raster, &ctx->state.g3d.rasterizer, sizeof(struct pipe_rasterizer_state));
+
+         cso_save_rasterizer(ctx->cso_context);
+         dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
+         dsa.stencil[0].ref_value = 0;
+         dsa.stencil[0].valuemask = ~0;
+
+         raster.cull_mode = raster.front_winding ^ PIPE_WINDING_BOTH;
+         dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INCR_WRAP;
+
+         cso_set_blend(ctx->cso_context, &blend);
+         cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+         cso_set_rasterizer(ctx->cso_context, &raster);
+         for (i = 0; i < polys->num_elements; ++i) {
+            struct polygon *poly = (((struct polygon**)polys->data)[i]);
+            draw_polygon(ctx, poly);
+         }
+
+         raster.cull_mode = raster.front_winding;
+         dsa.stencil[0].fail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_KEEP;
+         dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_DECR_WRAP;
+         cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+         cso_set_rasterizer(ctx->cso_context, &raster);
+         for (i = 0; i < polys->num_elements; ++i) {
+            struct polygon *poly = (((struct polygon**)polys->data)[i]);
+            draw_polygon(ctx, poly);
+         }
+
+         cso_restore_rasterizer(ctx->cso_context);
+      }
+   }
+
+   /* restore color writes */
+   cso_restore_blend(ctx->cso_context);
+   /* setup stencil ops */
+   dsa.stencil[0].func = PIPE_FUNC_NOTEQUAL;
+   dsa.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
+   dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
+   dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
+   dsa.stencil[0].ref_value = 0;
+   dsa.stencil[0].valuemask = dsa.stencil[0].writemask;
+   dsa.stencil[1].enabled = 0;
+   memcpy(&dsa.depth, &ctx->state.g3d.dsa.depth,
+          sizeof(struct pipe_depth_state));
+   cso_set_depth_stencil_alpha(ctx->cso_context, &dsa);
+
+   /* render the quad to propagate the rendering from stencil */
+   renderer_draw_quad(ctx->renderer, min_x, min_y,
+                      max_x, max_y, 0.0f/*depth should be disabled*/);
+
+   cso_restore_depth_stencil_alpha(ctx->cso_context);
+}