OpenVG 1.0 State Tracker

Import of the OpenVG 1.0 state tracker for Gallium.

1 files changed, 450 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/vega/vgu.c b/src/gallium/state_trackers/vega/vgu.c
new file mode 100644
index 00000000000..7dc51c5599c
--- /dev/null
+++ b/src/gallium/state_trackers/vega/vgu.c
@@ -0,0 +1,450 @@
+/**************************************************************************
+ *
+ * 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/vgu.h"
+
+#include "matrix.h"
+#include "path.h"
+
+#include "util/u_debug.h"
+#include "util/u_pointer.h"
+
+#include <math.h>
+#include <assert.h>
+
+static VGboolean is_aligned_to(const void *ptr, VGbyte alignment)
+{
+   void *aligned = align_pointer(ptr, alignment);
+   return (ptr == aligned) ? VG_TRUE : VG_FALSE;
+}
+
+static VGboolean is_aligned(const void *ptr)
+{
+   return is_aligned_to(ptr, 4);
+}
+
+static void vgu_append_float_coords(VGPath path,
+                                    const VGubyte *cmds,
+                                    VGint num_cmds,
+                                    const VGfloat *coords,
+                                    VGint num_coords)
+{
+   VGubyte common_data[40 * sizeof(VGfloat)];
+   struct path *p = (struct path *)path;
+
+   vg_float_to_datatype(path_datatype(p), common_data, coords, num_coords);
+   vgAppendPathData(path, num_cmds, cmds, common_data);
+}
+
+VGUErrorCode vguLine(VGPath path,
+                     VGfloat x0, VGfloat y0,
+                     VGfloat x1, VGfloat y1)
+{
+   static const VGubyte cmds[] = {VG_MOVE_TO_ABS, VG_LINE_TO_ABS};
+   VGfloat coords[4];
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      return VGU_BAD_HANDLE_ERROR;
+   }
+   caps = vgGetPathCapabilities(path);
+   if (!(caps & VG_PATH_CAPABILITY_APPEND_TO)) {
+      return VGU_PATH_CAPABILITY_ERROR;
+   }
+
+   coords[0] = x0;
+   coords[1] = y0;
+   coords[2] = x1;
+   coords[3] = y1;
+
+   vgu_append_float_coords(path, cmds, 2, coords, 4);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguPolygon(VGPath path,
+                        const VGfloat * points,
+                        VGint count,
+                        VGboolean closed)
+{
+   VGubyte *cmds;
+   VGfloat *coords;
+   VGbitfield caps;
+   VGint i;
+
+   if (path == VG_INVALID_HANDLE) {
+      return VGU_BAD_HANDLE_ERROR;
+   }
+
+   if (!points || count <= 0 || !is_aligned(points)) {
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+   }
+
+   caps = vgGetPathCapabilities(path);
+   if (!(caps & VG_PATH_CAPABILITY_APPEND_TO)) {
+      return VGU_PATH_CAPABILITY_ERROR;
+   }
+
+   cmds   = malloc(sizeof(VGubyte) * count + 1);
+   coords = malloc(sizeof(VGfloat) * count * 2);
+
+   cmds[0] = VG_MOVE_TO_ABS;
+   coords[0] = points[0];
+   coords[1] = points[1];
+   for (i = 1; i < count; ++i) {
+      cmds[i] = VG_LINE_TO_ABS;
+      coords[2*i + 0] = points[2*i + 0];
+      coords[2*i + 1] = points[2*i + 1];
+   }
+
+   if (closed) {
+      cmds[i] = VG_CLOSE_PATH;
+      ++i;
+   }
+
+   vgu_append_float_coords(path, cmds, i, coords, 2*i);
+
+   free(cmds);
+   free(coords);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode  vguRect(VGPath path,
+                      VGfloat x, VGfloat y,
+                      VGfloat width, VGfloat height)
+{
+   static const VGubyte cmds[] = {VG_MOVE_TO_ABS,
+                                  VG_HLINE_TO_REL,
+                                  VG_VLINE_TO_REL,
+                                  VG_HLINE_TO_REL,
+                                  VG_CLOSE_PATH
+   };
+   VGfloat coords[5];
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      return VGU_BAD_HANDLE_ERROR;
+   }
+   caps = vgGetPathCapabilities(path);
+   if (!(caps & VG_PATH_CAPABILITY_APPEND_TO)) {
+      return VGU_PATH_CAPABILITY_ERROR;
+   }
+   if (width <= 0 || height <= 0) {
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+   }
+
+   coords[0] =  x;
+   coords[1] =  y;
+   coords[2] =  width;
+   coords[3] =  height;
+   coords[4] = -width;
+
+   vgu_append_float_coords(path, cmds, 5, coords, 5);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguRoundRect(VGPath path,
+                          VGfloat x, VGfloat y,
+                          VGfloat width,
+                          VGfloat height,
+                          VGfloat arcWidth,
+                          VGfloat arcHeight)
+{
+   static const VGubyte cmds[] = {VG_MOVE_TO_ABS,
+                                  VG_HLINE_TO_REL,
+                                  VG_SCCWARC_TO_REL,
+                                  VG_VLINE_TO_REL,
+                                  VG_SCCWARC_TO_REL,
+                                  VG_HLINE_TO_REL,
+                                  VG_SCCWARC_TO_REL,
+                                  VG_VLINE_TO_REL,
+                                  VG_SCCWARC_TO_REL,
+                                  VG_CLOSE_PATH
+   };
+   VGfloat c[26];
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      return VGU_BAD_HANDLE_ERROR;
+   }
+   caps = vgGetPathCapabilities(path);
+   if (!(caps & VG_PATH_CAPABILITY_APPEND_TO)) {
+      return VGU_PATH_CAPABILITY_ERROR;
+   }
+   if (width <= 0 || height <= 0) {
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+   }
+
+   c[0] =  x + arcWidth/2; c[1] =  y;
+
+   c[2] = width - arcWidth;
+
+   c[3] = arcWidth/2; c[4] = arcHeight/2; c[5] = 0;
+   c[6] = arcWidth/2; c[7] = arcHeight/2;
+
+   c[8] = height - arcHeight;
+
+   c[9] = arcWidth/2; c[10] = arcHeight/2; c[11] = 0;
+   c[12] = -arcWidth/2; c[13] = arcHeight/2;
+
+   c[14] = -(width - arcWidth);
+
+   c[15] = arcWidth/2; c[16] = arcHeight/2; c[17] = 0;
+   c[18] = -arcWidth/2; c[19] = -arcHeight/2;
+
+   c[20] = -(height - arcHeight);
+
+   c[21] = arcWidth/2; c[22] = arcHeight/2; c[23] = 0;
+   c[24] = arcWidth/2; c[25] = -arcHeight/2;
+
+   vgu_append_float_coords(path, cmds, 10, c, 26);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguEllipse(VGPath path,
+                        VGfloat cx, VGfloat cy,
+                        VGfloat width,
+                        VGfloat height)
+{
+   static const VGubyte cmds[] = {VG_MOVE_TO_ABS,
+                                  VG_SCCWARC_TO_REL,
+                                  VG_SCCWARC_TO_REL,
+                                  VG_CLOSE_PATH
+   };
+   VGfloat coords[12];
+   VGbitfield caps;
+
+   if (path == VG_INVALID_HANDLE) {
+      return VGU_BAD_HANDLE_ERROR;
+   }
+   caps = vgGetPathCapabilities(path);
+   if (!(caps & VG_PATH_CAPABILITY_APPEND_TO)) {
+      return VGU_PATH_CAPABILITY_ERROR;
+   }
+   if (width <= 0 || height <= 0) {
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+   }
+
+   coords[0] = cx + width/2; coords[1] = cy;
+
+   coords[2] = width/2; coords[3] = height/2; coords[4] = 0;
+   coords[5] = -width; coords[6] = 0;
+
+   coords[7] = width/2; coords[8] = height/2; coords[9] = 0;
+   coords[10] = width; coords[11] = 0;
+
+   vgu_append_float_coords(path, cmds, 4, coords, 11);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguArc(VGPath path,
+                    VGfloat x, VGfloat y,
+                    VGfloat width, VGfloat height,
+                    VGfloat startAngle,
+                    VGfloat angleExtent,
+                    VGUArcType arcType)
+{
+   VGubyte cmds[11];
+   VGfloat coords[40];
+   VGbitfield caps;
+   VGfloat last = startAngle + angleExtent;
+   VGint i, c = 0;
+
+   if (path == VG_INVALID_HANDLE) {
+      return VGU_BAD_HANDLE_ERROR;
+   }
+   caps = vgGetPathCapabilities(path);
+   if (!(caps & VG_PATH_CAPABILITY_APPEND_TO)) {
+      return VGU_PATH_CAPABILITY_ERROR;
+   }
+   if (width <= 0 || height <= 0) {
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+   }
+   if (arcType != VGU_ARC_OPEN &&
+       arcType != VGU_ARC_CHORD &&
+       arcType != VGU_ARC_PIE) {
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+   }
+
+   cmds[c] = VG_MOVE_TO_ABS; ++c;
+   coords[0] = x+cos(DEGREES_TO_RADIANS(startAngle))*width/2;
+   coords[1] = y+sin(DEGREES_TO_RADIANS(startAngle))*height/2;
+#ifdef DEBUG_VGUARC
+   debug_printf("start [%f, %f]\n", coords[0], coords[1]);
+#endif
+   i = 2;
+   if (angleExtent > 0) {
+      VGfloat angle = startAngle + 180;
+      while (angle < last) {
+         cmds[c] = VG_SCCWARC_TO_ABS; ++c;
+         coords[i] = width/2; coords[i+1] = height/2; coords[i+2] = 0;
+         coords[i+3] = x + cos(DEGREES_TO_RADIANS(angle))*width/2;
+         coords[i+4] = y + sin(DEGREES_TO_RADIANS(angle))*height/2;
+#ifdef DEBUG_VGUARC
+         debug_printf("1 [%f, %f]\n", coords[i+3],
+                      coords[i+4]);
+#endif
+         i += 5;
+         angle += 180;
+      }
+      cmds[c] = VG_SCCWARC_TO_ABS; ++c;
+      coords[i] = width/2; coords[i+1] = height/2; coords[i+2] = 0;
+      coords[i+3] = x+cos(DEGREES_TO_RADIANS(last))*width/2;
+      coords[i+4] = y+sin(DEGREES_TO_RADIANS(last))*height/2;
+#ifdef DEBUG_VGUARC
+      debug_printf("2 [%f, %f]\n", coords[i+3],
+                   coords[i+4]);
+#endif
+      i += 5;
+   } else {
+      VGfloat angle = startAngle - 180;
+      while (angle > last) {
+         cmds[c] = VG_SCWARC_TO_ABS; ++c;
+         coords[i] =  width/2; coords[i+1] = height/2; coords[i+2] = 0;
+         coords[i+3] = x + cos(DEGREES_TO_RADIANS(angle)) * width/2;
+         coords[i+4] = y + sin(DEGREES_TO_RADIANS(angle)) * height/2;
+#ifdef DEBUG_VGUARC
+         debug_printf("3 [%f, %f]\n", coords[i+3],
+                      coords[i+4]);
+#endif
+         angle -= 180;
+         i += 5;
+      }
+      cmds[c] = VG_SCWARC_TO_ABS; ++c;
+      coords[i] = width/2; coords[i+1] = height/2; coords[i+2] = 0;
+      coords[i+3] = x + cos(DEGREES_TO_RADIANS(last)) * width/2;
+      coords[i+4] = y + sin(DEGREES_TO_RADIANS(last)) * height/2;
+#ifdef DEBUG_VGUARC
+      debug_printf("4 [%f, %f]\n", coords[i+3],
+                   coords[i+4]);
+#endif
+      i += 5;
+   }
+
+   if (arcType == VGU_ARC_PIE) {
+      cmds[c] = VG_LINE_TO_ABS; ++c;
+      coords[i] = x; coords[i + 1] = y;
+      i += 2;
+   }
+   if (arcType == VGU_ARC_PIE || arcType == VGU_ARC_CHORD) {
+      cmds[c] = VG_CLOSE_PATH;
+      ++c;
+   }
+
+   assert(c < 11);
+
+   vgu_append_float_coords(path, cmds, c, coords, i);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguComputeWarpQuadToSquare(VGfloat sx0, VGfloat sy0,
+                                        VGfloat sx1, VGfloat sy1,
+                                        VGfloat sx2, VGfloat sy2,
+                                        VGfloat sx3, VGfloat sy3,
+                                        VGfloat * matrix)
+{
+   struct matrix mat;
+
+   if (!matrix || !is_aligned(matrix))
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+
+   if (!matrix_quad_to_square(sx0, sy0,
+                              sx1, sy1,
+                              sx2, sy2,
+                              sx3, sy3,
+                              &mat))
+      return VGU_BAD_WARP_ERROR;
+
+   if (!matrix_is_invertible(&mat))
+      return VGU_BAD_WARP_ERROR;
+
+   memcpy(matrix, mat.m, sizeof(VGfloat) * 9);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguComputeWarpSquareToQuad(VGfloat dx0, VGfloat dy0,
+                                        VGfloat dx1, VGfloat dy1,
+                                        VGfloat dx2, VGfloat dy2,
+                                        VGfloat dx3, VGfloat dy3,
+                                        VGfloat * matrix)
+{
+   struct matrix mat;
+
+   if (!matrix || !is_aligned(matrix))
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+
+   if (!matrix_square_to_quad(dx0, dy0,
+                              dx1, dy1,
+                              dx2, dy2,
+                              dx3, dy3,
+                              &mat))
+      return VGU_BAD_WARP_ERROR;
+
+   if (!matrix_is_invertible(&mat))
+      return VGU_BAD_WARP_ERROR;
+
+   memcpy(matrix, mat.m, sizeof(VGfloat) * 9);
+
+   return VGU_NO_ERROR;
+}
+
+VGUErrorCode vguComputeWarpQuadToQuad(VGfloat dx0, VGfloat dy0,
+                                      VGfloat dx1, VGfloat dy1,
+                                      VGfloat dx2, VGfloat dy2,
+                                      VGfloat dx3, VGfloat dy3,
+                                      VGfloat sx0, VGfloat sy0,
+                                      VGfloat sx1, VGfloat sy1,
+                                      VGfloat sx2, VGfloat sy2,
+                                      VGfloat sx3, VGfloat sy3,
+                                      VGfloat * matrix)
+{
+   struct matrix mat;
+
+   if (!matrix || !is_aligned(matrix))
+      return VGU_ILLEGAL_ARGUMENT_ERROR;
+
+   if (!matrix_quad_to_quad(dx0, dy0,
+                            dx1, dy1,
+                            dx2, dy2,
+                            dx3, dy3,
+                            sx0, sy0,
+                            sx1, sy1,
+                            sx2, sy2,
+                            sx3, sy3,
+                            &mat))
+      return VGU_BAD_WARP_ERROR;
+
+   memcpy(matrix, mat.m, sizeof(VGfloat) * 9);
+
+   return VGU_NO_ERROR;
+}