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#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkCornerPathEffect.h"
#include "SkCullPoints.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include <AGL/agl.h>
#include <OpenGL/gl.h>
static void test_draw_gl(SkCanvas* canvas) {
const float verts[] = {
10, 10, 250, 250, 490, 10
};
const float texs[] = {
0, 0, 0.5f, 0, 1, 1
};
const uint8_t colors[] = {
0, 0, 0, 1,
128, 0, 0, 1,
255, 255, 0, 1
};
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, verts);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
// glTexCoordPointer(2, GL_FLOAT, 0, texs);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
glDrawArrays(GL_TRIANGLES, 0, 3);
}
static const char* gVertShaderText =
"varying vec2 uv;"
"void main(void) {"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;"
" uv = vec2(gl_Color);"
"}";
static const char* gFragShaderText =
"varying vec2 uv;"
"void main(void) {"
" float u = uv.x;"
" float v = uv.y;"
" if (u*u > v) {"
" gl_FragColor = vec4(1.0, 0, 0, 1.0);"
" } else {"
" gl_FragColor = vec4(0, 1.0, 0, 1.0);"
"}"
"}";
static bool compile_shader(GLuint shader) {
glCompileShader(shader);
GLint success;
glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
if (!success) {
GLchar buffer[256];
glGetShaderInfoLog(shader, sizeof(buffer), NULL, buffer);
SkDebugf("---- glCompileShader failed: %s\n", buffer);
return false;
}
return true;
}
static bool link_program(GLuint program) {
glLinkProgram(program);
GLint success;
glGetProgramiv(program, GL_LINK_STATUS, &success);
if (!success) {
GLchar buffer[256];
glGetProgramInfoLog(program, sizeof(buffer), NULL, buffer);
SkDebugf("---- glLinkProgram failed: %s\n", buffer);
return false;
}
return true;
}
static void test_glshader(SkCanvas* canvas) {
GLuint vertShader = glCreateShader(GL_VERTEX_SHADER);
GLuint fragShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(vertShader, 1, &gVertShaderText, NULL);
glShaderSource(fragShader, 1, &gFragShaderText, NULL);
if (!compile_shader(vertShader)) { return; }
if (!compile_shader(fragShader)) { return; }
GLuint program = glCreateProgram();
glAttachShader(program, vertShader);
glAttachShader(program, fragShader);
if (link_program(program)) {
glUseProgram(program);
test_draw_gl(canvas);
glUseProgram(0);
}
glDeleteProgram(program);
glDeleteShader(vertShader);
glDeleteShader(fragShader);
}
static void setmatrix6(SkMatrix* matrix, const float val[]) {
matrix->reset();
for (int i = 0; i < 6; i++) {
matrix->set(i, val[i]);
}
}
static void testinvert() {
SkMatrix matrix;
const float vals[] = { 0,9,.000001,10000,0,0 };
setmatrix6(&matrix, vals);
const float vals2[] = { 0,100,71,9,0,7 };
SkMatrix tmp;
setmatrix6(&tmp, vals2);
matrix.preConcat(tmp);
matrix.dump();
SkMatrix inverse;
matrix.invert(&inverse);
inverse.dump();
matrix.preConcat(inverse);
matrix.dump();
// o2dContext.setTransform(0,9,.000001,10000,0,0);
// o2dContext.transform(0,100,71,9,0,7);
// o2dContext.setTransform(0,6,95,4,1,0);
}
/*
[0] 9.9999997e-005 float
[1] 9.0000003e-006 float
[2] 7.0000001e-006 float
[3] 1000000.0 float
[4] 90639.000 float
[5] 70000.000 float
[6] 0.00000000 float
[7] 0.00000000 float
[8] 1.0000000 float
*/
static void testinvert2() {
const float val[] = {
9.9999997e-005, 9.0000003e-006, 7.0000001e-006,
1000000.0, 90639.000, 70000.000
};
SkMatrix matrix;
setmatrix6(&matrix, val);
matrix.dump();
SkMatrix inverse;
matrix.invert(&inverse);
inverse.dump();
matrix.preConcat(inverse);
matrix.dump();
// result is that matrix[3] is 49550 instead of 0 :(
}
static void show_ramp(SkCanvas* canvas, const SkRect& r) {
SkPoint pts[] = { r.fLeft, 0, r.fRight, 0 };
SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
SkShader::kRepeat_TileMode);
SkPaint p;
p.setShader(s)->unref();
canvas->drawRect(r, p);
canvas->translate(r.width() + SkIntToScalar(8), 0);
p.setDither(true);
canvas->drawRect(r, p);
}
class TestGLView : public SkView {
public:
TestGLView() {
testinvert2();
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "TestGL");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(0xFFDDDDDD);
}
virtual void onDraw(SkCanvas* canvas) {
drawBG(canvas);
if (canvas->getViewport(NULL)) {
test_glshader(canvas);
return;
}
SkRect r;
r.set(0, 0, 100, 100);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
SkPaint paint;
paint.setAntiAlias(false);
paint.setColor(SK_ColorRED);
canvas->drawRect(r, paint);
canvas->translate(r.width() + SkIntToScalar(20), 0);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(r, paint);
canvas->translate(r.width() + SkIntToScalar(20), 0);
paint.setStrokeWidth(SkIntToScalar(5));
canvas->drawRect(r, paint);
canvas->translate(r.width() * 10/9, 0);
show_ramp(canvas, r);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new TestGLView; }
static SkViewRegister reg(MyFactory);
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