add gpu backend (not hooked up yet)
git-svn-id: http://skia.googlecode.com/svn/trunk@649 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrGpuVertex.h b/gpu/include/GrGpuVertex.h
new file mode 100644
index 0000000..1e3293a
--- /dev/null
+++ b/gpu/include/GrGpuVertex.h
@@ -0,0 +1,104 @@
+/*
+ Copyright 2010 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+
+#ifndef GrGpuVertex_DEFINED
+#define GrGpuVertex_DEFINED
+
+#include "GrGLConfig.h"
+#include "GrPoint.h"
+
+#if GR_TEXT_SCALAR_IS_USHORT
+ typedef uint16_t GrTextScalar;
+ #define GrIntToTextScalar(x) ((uint16_t)x)
+ #define GrFixedToTextScalar(x) (x)
+#elif GR_TEXT_SCALAR_IS_FIXED
+ typedef GrFixed GrTextScalar;
+ #define GrIntToTextScalar(x) GrIntToFixed(x)
+ #define GrFixedToTextScalar(x) (x)
+#elif GR_TEXT_SCALAR_IS_FLOAT
+ typedef float GrTextScalar;
+ #define GrIntToTextScalar(x) ((GrTextScalar)x)
+ #define GrFixedToTextScalar(x) GrFixedToFloat(x)
+#else
+ #error "Text scalar type not defined"
+#endif
+
+// text has its own vertex class, since it may want to be in fixed point (given)
+// that it starts with all integers) even when the default vertices are floats
+struct GrGpuTextVertex {
+ GrTextScalar fX;
+ GrTextScalar fY;
+
+ void set(GrTextScalar x, GrTextScalar y) {
+ fX = x;
+ fY = y;
+ }
+
+ void setI(int x, int y) {
+ fX = GrIntToTextScalar(x);
+ fY = GrIntToTextScalar(y);
+ }
+
+ void setX(GrFixed x, GrFixed y) {
+ fX = GrFixedToTextScalar(x);
+ fY = GrFixedToTextScalar(y);
+ }
+
+ // rect fan is counter-clockwise
+
+ void setRectFan(GrTextScalar l, GrTextScalar t, GrTextScalar r,
+ GrTextScalar b) {
+ GrGpuTextVertex* v = this;
+ v[0].set(l, t);
+ v[1].set(l, b);
+ v[2].set(r, b);
+ v[3].set(r, t);
+ }
+
+ void setIRectFan(int l, int t, int r, int b) {
+ this->setRectFan(GrIntToTextScalar(l), GrIntToTextScalar(t),
+ GrIntToTextScalar(r), GrIntToTextScalar(b));
+ }
+
+ void setIRectFan(int l, int t, int r, int b, size_t stride) {
+ GrAssert(stride > sizeof(GrGpuTextVertex));
+ char* v = (char*)this;
+ ((GrGpuTextVertex*)(v + 0*stride))->setI(l, t);
+ ((GrGpuTextVertex*)(v + 1*stride))->setI(l, b);
+ ((GrGpuTextVertex*)(v + 2*stride))->setI(r, b);
+ ((GrGpuTextVertex*)(v + 3*stride))->setI(r, t);
+ }
+
+ // counter-clockwise fan
+ void setXRectFan(GrFixed l, GrFixed t, GrFixed r, GrFixed b) {
+ this->setRectFan(GrFixedToTextScalar(l), GrFixedToTextScalar(t),
+ GrFixedToTextScalar(r), GrFixedToTextScalar(b));
+ }
+
+ void setXRectFan(GrFixed l, GrFixed t, GrFixed r, GrFixed b, size_t stride) {
+ GrAssert(stride > sizeof(GrGpuTextVertex));
+ char* v = (char*)this;
+ ((GrGpuTextVertex*)(v + 0*stride))->setX(l, t);
+ ((GrGpuTextVertex*)(v + 1*stride))->setX(l, b);
+ ((GrGpuTextVertex*)(v + 2*stride))->setX(r, b);
+ ((GrGpuTextVertex*)(v + 3*stride))->setX(r, t);
+ }
+
+};
+
+#endif
+