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