OpenVG 1.0 State Tracker

Import of the OpenVG 1.0 state tracker for Gallium.

1 files changed, 488 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/vega/api_path.c b/src/gallium/state_trackers/vega/api_path.c
new file mode 100644
index 00000000000..a6b7a2bb93a
--- /dev/null
+++ b/src/gallium/state_trackers/vega/api_path.c
@@ -0,0 +1,488 @@
+/**************************************************************************
+ *
+ * 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 "VG/openvg.h"
+
+#include "vg_context.h"
+#include "path.h"
+#include "polygon.h"
+#include "paint.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+#include "util/u_draw_quad.h"
+
+VGPath vgCreatePath(VGint pathFormat,
+                    VGPathDatatype datatype,
+                    VGfloat scale, VGfloat bias,
+                    VGint segmentCapacityHint,
+                    VGint coordCapacityHint,
+                    VGbitfield capabilities)
+{
+   struct vg_context *ctx = vg_current_context();
+
+   if (pathFormat != VG_PATH_FORMAT_STANDARD) {
+      vg_set_error(ctx, VG_UNSUPPORTED_PATH_FORMAT_ERROR);
+      return VG_INVALID_HANDLE;
+   }
+   if (datatype < VG_PATH_DATATYPE_S_8 ||
+       datatype > VG_PATH_DATATYPE_F) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return VG_INVALID_HANDLE;
+   }
+   if (!scale) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return VG_INVALID_HANDLE;
+   }
+
+   return (VGPath)path_create(datatype, scale, bias,
+                              segmentCapacityHint, coordCapacityHint,
+                              capabilities);
+}
+
+void vgClearPath(VGPath path, VGbitfield capabilities)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+
+   p = (struct path *)path;
+   path_clear(p, capabilities);
+}
+
+void vgDestroyPath(VGPath p)
+{
+   struct path *path = 0;
+   struct vg_context *ctx = vg_current_context();
+
+   if (p == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+
+   path = (struct path *)p;
+   path_destroy(path);
+}
+
+void vgRemovePathCapabilities(VGPath path,
+                              VGbitfield capabilities)
+{
+   struct vg_context *ctx = vg_current_context();
+   VGbitfield current;
+   struct path *p;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+
+   p = (struct path*)path;
+   current = path_capabilities(p);
+   path_set_capabilities(p, (current &
+                             (~(capabilities & VG_PATH_CAPABILITY_ALL))));
+}
+
+VGbitfield vgGetPathCapabilities(VGPath path)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return 0;
+   }
+   p = (struct path*)path;
+   return path_capabilities(p);
+}
+
+void vgAppendPath(VGPath dstPath, VGPath srcPath)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *src, *dst;
+
+   if (dstPath == VG_INVALID_HANDLE || srcPath == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+   src = (struct path *)srcPath;
+   dst = (struct path *)dstPath;
+
+   if (!(path_capabilities(src) & VG_PATH_CAPABILITY_APPEND_FROM) ||
+       !(path_capabilities(dst) & VG_PATH_CAPABILITY_APPEND_TO)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+   path_append_path(dst, src);
+}
+
+void vgAppendPathData(VGPath dstPath,
+                      VGint numSegments,
+                      const VGubyte * pathSegments,
+                      const void * pathData)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+   VGint i;
+
+   if (dstPath == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+   if (!pathSegments) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+   if (numSegments <= 0) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+   for (i = 0; i < numSegments; ++i) {
+      if (pathSegments[i] < VG_CLOSE_PATH ||
+          pathSegments[i] > VG_LCWARC_TO_REL) {
+         vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+         return;
+      }
+   }
+
+   p = (struct path*)dstPath;
+
+   if (!pathData || !is_aligned_to(pathData, path_datatype_size(p))) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   if (!(path_capabilities(p)&VG_PATH_CAPABILITY_APPEND_TO)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+
+   path_append_data(p, numSegments, pathSegments, pathData);
+}
+
+void vgModifyPathCoords(VGPath dstPath,
+                        VGint startIndex,
+                        VGint numSegments,
+                        const void * pathData)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+
+   if (dstPath == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+   if (startIndex < 0 || numSegments <= 0) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   p = (struct path *)dstPath;
+
+   if (!pathData || !is_aligned_to(pathData, path_datatype_size(p))) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   if (startIndex + numSegments > path_num_segments(p)) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+   if (!(path_capabilities(p)&VG_PATH_CAPABILITY_MODIFY)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+   path_modify_coords(p, startIndex, numSegments, pathData);
+}
+
+void vgTransformPath(VGPath dstPath, VGPath srcPath)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *src = 0, *dst = 0;
+
+   if (dstPath == VG_INVALID_HANDLE || srcPath == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+   src = (struct path *)srcPath;
+   dst = (struct path *)dstPath;
+
+   if (!(path_capabilities(src) & VG_PATH_CAPABILITY_TRANSFORM_FROM) ||
+       !(path_capabilities(dst) & VG_PATH_CAPABILITY_TRANSFORM_TO)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+   path_transform(dst, src);
+}
+
+VGboolean vgInterpolatePath(VGPath dstPath,
+                            VGPath startPath,
+                            VGPath endPath,
+                            VGfloat amount)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *start = 0, *dst = 0, *end = 0;
+
+   if (dstPath == VG_INVALID_HANDLE ||
+       startPath == VG_INVALID_HANDLE ||
+       endPath == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return VG_FALSE;
+   }
+   dst = (struct path *)dstPath;
+   start = (struct path *)startPath;
+   end = (struct path *)endPath;
+
+   if (!(path_capabilities(dst) & VG_PATH_CAPABILITY_INTERPOLATE_TO) ||
+       !(path_capabilities(start) & VG_PATH_CAPABILITY_INTERPOLATE_FROM) ||
+       !(path_capabilities(end) & VG_PATH_CAPABILITY_INTERPOLATE_FROM)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return VG_FALSE;
+   }
+
+   return path_interpolate(dst,
+                           start, end, amount);
+}
+
+VGfloat vgPathLength(VGPath path,
+                     VGint startSegment,
+                     VGint numSegments)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return -1;
+   }
+   if (startSegment < 0) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return -1;
+   }
+   if (numSegments <= 0) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return -1;
+   }
+   p = (struct path*)path;
+
+   if (!(path_capabilities(p) & VG_PATH_CAPABILITY_PATH_LENGTH)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return -1;
+   }
+   if (startSegment + numSegments > path_num_segments(p)) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return -1;
+   }
+
+   return path_length(p, startSegment, numSegments);
+}
+
+void vgPointAlongPath(VGPath path,
+                      VGint startSegment,
+                      VGint numSegments,
+                      VGfloat distance,
+                      VGfloat * x, VGfloat * y,
+                      VGfloat * tangentX,
+                      VGfloat * tangentY)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+   if (startSegment < 0) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+   if (numSegments <= 0) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   if (!is_aligned(x) || !is_aligned(y) ||
+       !is_aligned(tangentX) || !is_aligned(tangentY)) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   p = (struct path*)path;
+
+   caps = path_capabilities(p);
+   if (!(caps & VG_PATH_CAPABILITY_POINT_ALONG_PATH) ||
+       !(caps & VG_PATH_CAPABILITY_TANGENT_ALONG_PATH)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+
+   if (startSegment + numSegments > path_num_segments(p)) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   {
+      VGfloat point[2], normal[2];
+      path_point(p, startSegment, numSegments, distance,
+                 point, normal);
+      if (x)
+         *x = point[0];
+      if (y)
+         *y = point[1];
+      if (tangentX)
+         *tangentX = -normal[1];
+      if (tangentY)
+         *tangentY = normal[0];
+   }
+}
+
+void vgPathBounds(VGPath path,
+                  VGfloat * minX,
+                  VGfloat * minY,
+                  VGfloat * width,
+                  VGfloat * height)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+
+   if (!minX || !minY || !width || !height) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   if (!is_aligned(minX) || !is_aligned(minY) ||
+       !is_aligned(width) || !is_aligned(height)) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   p = (struct path*)path;
+
+   caps = path_capabilities(p);
+   if (!(caps & VG_PATH_CAPABILITY_PATH_BOUNDS)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+
+   path_bounding_rect(p, minX, minY, width, height);
+}
+
+void vgPathTransformedBounds(VGPath path,
+                             VGfloat * minX,
+                             VGfloat * minY,
+                             VGfloat * width,
+                             VGfloat * height)
+{
+   struct vg_context *ctx = vg_current_context();
+   struct path *p = 0;
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+
+   if (!minX || !minY || !width || !height) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   if (!is_aligned(minX) || !is_aligned(minY) ||
+       !is_aligned(width) || !is_aligned(height)) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   p = (struct path*)path;
+
+   caps = path_capabilities(p);
+   if (!(caps & VG_PATH_CAPABILITY_PATH_TRANSFORMED_BOUNDS)) {
+      vg_set_error(ctx, VG_PATH_CAPABILITY_ERROR);
+      return;
+   }
+
+#if 0
+   /* faster, but seems to have precision problems... */
+   path_bounding_rect(p, minX, minY, width, height);
+   if (*width > 0 && *height > 0) {
+      VGfloat pts[] = {*minX,          *minY,
+                       *minX + *width, *minY,
+                       *minX + *width, *minY + *height,
+                       *minX,          *minY + *height};
+      struct matrix *matrix = &ctx->state.vg.path_user_to_surface_matrix;
+      VGfloat maxX, maxY;
+      matrix_map_point(matrix, pts[0], pts[1], pts + 0, pts + 1);
+      matrix_map_point(matrix, pts[2], pts[3], pts + 2, pts + 3);
+      matrix_map_point(matrix, pts[4], pts[5], pts + 4, pts + 5);
+      matrix_map_point(matrix, pts[6], pts[7], pts + 6, pts + 7);
+      *minX = MIN2(pts[0], MIN2(pts[2], MIN2(pts[4], pts[6])));
+      *minY = MIN2(pts[1], MIN2(pts[3], MIN2(pts[5], pts[7])));
+      maxX = MAX2(pts[0], MAX2(pts[2], MAX2(pts[4], pts[6])));
+      maxY = MAX2(pts[1], MAX2(pts[3], MAX2(pts[5], pts[7])));
+      *width  = maxX - *minX;
+      *height = maxY - *minY;
+   }
+#else
+   {
+      struct path *dst = path_create(VG_PATH_DATATYPE_F, 1.0, 0,
+                                     0, 0, VG_PATH_CAPABILITY_ALL);
+      path_transform(dst, p);
+      path_bounding_rect(dst, minX, minY, width, height);
+      path_destroy(dst);
+   }
+#endif
+}
+
+
+void vgDrawPath(VGPath path, VGbitfield paintModes)
+{
+   struct vg_context *ctx = vg_current_context();
+
+   if (path == VG_INVALID_HANDLE) {
+      vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
+      return;
+   }
+
+   if (!(paintModes & (VG_STROKE_PATH | VG_FILL_PATH))) {
+      vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+      return;
+   }
+
+   if (path_is_empty((struct path*)path))
+      return;
+   path_render((struct path*)path, paintModes);
+}
+