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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm.h"
#if SK_SUPPORT_GPU
#include "GrBackendSurface.h"
#include "GrContext.h"
#include "GrGpu.h"
#include "GrTest.h"
#include "gl/GrGLContext.h"
#include "SkBitmap.h"
#include "SkGradientShader.h"
#include "SkImage.h"
namespace skiagm {
class RectangleTexture : public GM {
public:
RectangleTexture() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("rectangle_texture");
}
SkISize onISize() override {
return SkISize::Make(1035, 240);
}
void fillPixels(int width, int height, void *pixels) {
SkBitmap bmp;
bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4);
bmp.setPixels(pixels);
SkPaint paint;
SkCanvas canvas(bmp);
SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} };
SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 };
paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2,
SkShader::kClamp_TileMode));
canvas.drawPaint(paint);
SkColor colors1[] = { 0xFFA07010 , 0xFFA02080 };
paint.setAntiAlias(true);
paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2,
SkShader::kClamp_TileMode));
canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2,
SkIntToScalar(width + height) / 5, paint);
}
sk_sp<SkImage> createRectangleTextureImg(GrContext* context, int width, int height,
void* pixels) {
if (!context) {
return nullptr;
}
GrGpu* gpu = context->getGpu();
if (!gpu) {
return nullptr;
}
const GrGLContext* glCtx = gpu->glContextForTesting();
if (!glCtx) {
return nullptr;
}
if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) &&
!glCtx->hasExtension("GL_ARB_texture_rectangle")) {
return nullptr;
}
// We will always create the GL texture as GL_RGBA, however the pixels uploaded may be
// be RGBA or BGRA, depending on how SkPMColor was compiled.
GrGLenum format;
if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) {
format = GR_GL_BGRA;
} else {
SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig);
format = GR_GL_RGBA;
}
const GrGLInterface* gl = glCtx->interface();
// Useful for debugging whether errors result from use of RECTANGLE
// #define TARGET GR_GL_TEXTURE_2D
#define TARGET GR_GL_TEXTURE_RECTANGLE
GrGLuint id = 0;
GR_GL_CALL(gl, GenTextures(1, &id));
GR_GL_CALL(gl, BindTexture(TARGET, id));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MAG_FILTER,
GR_GL_NEAREST));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MIN_FILTER,
GR_GL_NEAREST));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_S,
GR_GL_CLAMP_TO_EDGE));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_T,
GR_GL_CLAMP_TO_EDGE));
GR_GL_CALL(gl, TexImage2D(TARGET, 0, GR_GL_RGBA, width, height, 0,
format, GR_GL_UNSIGNED_BYTE, pixels));
context->resetContext();
GrGLTextureInfo info;
info.fID = id;
info.fTarget = TARGET;
GrBackendTexture rectangleTex(width, height, kRGBA_8888_GrPixelConfig, &info);
if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex,
kTopLeft_GrSurfaceOrigin)) {
return image;
}
GR_GL_CALL(gl, DeleteTextures(1, &id));
return nullptr;
}
void onDraw(SkCanvas* canvas) override {
GrContext *context = canvas->getGrContext();
if (!context) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
constexpr int kWidth = 50;
constexpr int kHeight = 50;
constexpr SkScalar kPad = 5.f;
SkPMColor pixels[kWidth * kHeight];
this->fillPixels(kWidth, kHeight, pixels);
sk_sp<SkImage> rectImg(this->createRectangleTextureImg(context, kWidth, kHeight, pixels));
if (!rectImg) {
SkPaint paint;
paint.setAntiAlias(true);
const char* kMsg = "Could not create rectangle texture image.";
canvas->drawText(kMsg, strlen(kMsg), 10, 100, paint);
return;
}
constexpr SkFilterQuality kQualities[] = {
kNone_SkFilterQuality,
kLow_SkFilterQuality,
kMedium_SkFilterQuality,
kHigh_SkFilterQuality,
};
constexpr SkScalar kScales[] = { 1.0f, 1.2f, 0.75f };
canvas->translate(kPad, kPad);
for (auto s : kScales) {
canvas->save();
canvas->scale(s, s);
for (auto q : kQualities) {
SkPaint plainPaint;
plainPaint.setFilterQuality(q);
canvas->drawImage(rectImg.get(), 0, 0, &plainPaint);
canvas->translate(kWidth + kPad, 0);
SkPaint clampPaint;
clampPaint.setFilterQuality(q);
clampPaint.setShader(rectImg->makeShader(SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode));
canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint);
canvas->translate(kWidth * 1.5f + kPad, 0);
SkPaint repeatPaint;
repeatPaint.setFilterQuality(q);
repeatPaint.setShader(rectImg->makeShader(SkShader::kRepeat_TileMode,
SkShader::kMirror_TileMode));
canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint);
canvas->translate(1.5f * kWidth + kPad, 0);
}
canvas->restore();
canvas->translate(0, kPad + 1.5f * kHeight * s);
}
}
private:
typedef GM INHERITED;
};
DEF_GM(return new RectangleTexture;)
}
#endif
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