rectangletexture.cpp 8.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221
  1. /*
  2. * Copyright 2016 Google Inc.
  3. *
  4. * Use of this source code is governed by a BSD-style license that can be
  5. * found in the LICENSE file.
  6. */
  7. // This test only works with the GPU backend.
  8. #include "gm/gm.h"
  9. #include "include/core/SkBitmap.h"
  10. #include "include/core/SkCanvas.h"
  11. #include "include/core/SkColor.h"
  12. #include "include/core/SkFilterQuality.h"
  13. #include "include/core/SkImage.h"
  14. #include "include/core/SkImageInfo.h"
  15. #include "include/core/SkPaint.h"
  16. #include "include/core/SkPoint.h"
  17. #include "include/core/SkRect.h"
  18. #include "include/core/SkRefCnt.h"
  19. #include "include/core/SkScalar.h"
  20. #include "include/core/SkShader.h"
  21. #include "include/core/SkSize.h"
  22. #include "include/core/SkString.h"
  23. #include "include/core/SkTileMode.h"
  24. #include "include/core/SkTypes.h"
  25. #include "include/effects/SkGradientShader.h"
  26. #include "include/gpu/GrBackendSurface.h"
  27. #include "include/gpu/GrContext.h"
  28. #include "include/gpu/GrTypes.h"
  29. #include "include/gpu/gl/GrGLFunctions.h"
  30. #include "include/gpu/gl/GrGLInterface.h"
  31. #include "include/gpu/gl/GrGLTypes.h"
  32. #include "include/private/GrTypesPriv.h"
  33. #include "src/gpu/GrContextPriv.h"
  34. #include "src/gpu/GrGpu.h"
  35. #include "src/gpu/gl/GrGLContext.h"
  36. #include "src/gpu/gl/GrGLDefines.h"
  37. #include "src/gpu/gl/GrGLUtil.h"
  38. #include <algorithm>
  39. #include <cstdint>
  40. #include <memory>
  41. class GrRenderTargetContext;
  42. namespace skiagm {
  43. class RectangleTexture : public GpuGM {
  44. public:
  45. RectangleTexture() {
  46. this->setBGColor(0xFFFFFFFF);
  47. }
  48. protected:
  49. SkString onShortName() override {
  50. return SkString("rectangle_texture");
  51. }
  52. SkISize onISize() override { return SkISize::Make(1200, 500); }
  53. void fillPixels(int width, int height, void *pixels) {
  54. SkBitmap bmp;
  55. bmp.setInfo(SkImageInfo::Make(width, height, kRGBA_8888_SkColorType, kOpaque_SkAlphaType));
  56. bmp.setPixels(pixels);
  57. SkPaint paint;
  58. SkCanvas canvas(bmp);
  59. SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} };
  60. SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 };
  61. paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, SkTileMode::kClamp));
  62. canvas.drawPaint(paint);
  63. SkColor colors1[] = {0xFFA07010, 0xFFA02080};
  64. paint.setAntiAlias(true);
  65. paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, SkTileMode::kClamp));
  66. canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2,
  67. SkIntToScalar(width + height) / 5, paint);
  68. }
  69. static const GrGLContext* GetGLContextIfSupported(GrContext* context) {
  70. if (context->backend() != GrBackendApi::kOpenGL) {
  71. return nullptr;
  72. }
  73. auto* caps = static_cast<const GrGLCaps*>(context->priv().caps());
  74. if (!caps->rectangleTextureSupport()) {
  75. return nullptr;
  76. }
  77. return context->priv().getGpu()->glContextForTesting();
  78. }
  79. sk_sp<SkImage> createRectangleTextureImg(GrContext* context, GrSurfaceOrigin origin, int width,
  80. int height, const uint32_t* pixels) {
  81. const GrGLContext* glCtx = GetGLContextIfSupported(context);
  82. if (!glCtx) {
  83. return nullptr;
  84. }
  85. const GrGLInterface* gl = glCtx->interface();
  86. // Useful for debugging whether errors result from use of RECTANGLE
  87. // static constexpr GrGLenum kTarget = GR_GL_TEXTURE_2D;
  88. static constexpr GrGLenum kTarget = GR_GL_TEXTURE_RECTANGLE;
  89. GrGLuint id = 0;
  90. GR_GL_CALL(gl, GenTextures(1, &id));
  91. GR_GL_CALL(gl, BindTexture(kTarget, id));
  92. GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST));
  93. GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST));
  94. GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE));
  95. GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE));
  96. std::unique_ptr<uint32_t[]> tempPixels;
  97. if (origin == kBottomLeft_GrSurfaceOrigin) {
  98. tempPixels.reset(new uint32_t[width * height]);
  99. for (int y = 0; y < height; ++y) {
  100. std::copy_n(pixels + width * (height - y - 1), width, tempPixels.get() + width * y);
  101. }
  102. pixels = tempPixels.get();
  103. }
  104. GR_GL_CALL(gl, TexImage2D(kTarget, 0, GR_GL_RGBA, width, height, 0, GR_GL_RGBA,
  105. GR_GL_UNSIGNED_BYTE, pixels));
  106. context->resetContext();
  107. GrGLTextureInfo info;
  108. info.fID = id;
  109. info.fTarget = kTarget;
  110. info.fFormat = GR_GL_RGBA8;
  111. GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info);
  112. if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, origin,
  113. kRGBA_8888_SkColorType)) {
  114. return image;
  115. }
  116. GR_GL_CALL(gl, DeleteTextures(1, &id));
  117. return nullptr;
  118. }
  119. DrawResult onDraw(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas,
  120. SkString* errorMsg) override {
  121. if (!GetGLContextIfSupported(context)) {
  122. *errorMsg = "this GM requires an OpenGL 3.1+ context";
  123. return DrawResult::kSkip;
  124. }
  125. constexpr int kWidth = 50;
  126. constexpr int kHeight = 50;
  127. constexpr SkScalar kPad = 5.f;
  128. SkPMColor pixels[kWidth * kHeight];
  129. this->fillPixels(kWidth, kHeight, pixels);
  130. sk_sp<SkImage> rectImgs[] = {
  131. this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, kWidth, kHeight,
  132. pixels),
  133. this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin, kWidth,
  134. kHeight, pixels),
  135. };
  136. SkASSERT(SkToBool(rectImgs[0]) == SkToBool(rectImgs[1]));
  137. if (!rectImgs[0]) {
  138. *errorMsg = "Could not create rectangle texture image.";
  139. return DrawResult::kFail;
  140. }
  141. constexpr SkFilterQuality kQualities[] = {
  142. kNone_SkFilterQuality,
  143. kLow_SkFilterQuality,
  144. kMedium_SkFilterQuality,
  145. kHigh_SkFilterQuality,
  146. };
  147. constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f};
  148. canvas->translate(kPad, kPad);
  149. for (size_t i = 0; i < SK_ARRAY_COUNT(rectImgs); ++i) {
  150. for (auto s : kScales) {
  151. canvas->save();
  152. canvas->scale(s, s);
  153. for (auto q : kQualities) {
  154. // drawImage
  155. SkPaint plainPaint;
  156. plainPaint.setFilterQuality(q);
  157. canvas->drawImage(rectImgs[i], 0, 0, &plainPaint);
  158. canvas->translate(kWidth + kPad, 0);
  159. // clamp/clamp shader
  160. SkPaint clampPaint;
  161. clampPaint.setFilterQuality(q);
  162. clampPaint.setShader(rectImgs[i]->makeShader());
  163. canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint);
  164. canvas->translate(kWidth * 1.5f + kPad, 0);
  165. // repeat/mirror shader
  166. SkPaint repeatPaint;
  167. repeatPaint.setFilterQuality(q);
  168. repeatPaint.setShader(rectImgs[i]->makeShader(SkTileMode::kRepeat,
  169. SkTileMode::kMirror));
  170. canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint);
  171. canvas->translate(1.5f * kWidth + kPad, 0);
  172. // drawImageRect with kStrict
  173. auto srcRect = SkRect::MakeXYWH(.25f * rectImgs[i]->width(),
  174. .25f * rectImgs[i]->height(),
  175. .50f * rectImgs[i]->width(),
  176. .50f * rectImgs[i]->height());
  177. auto dstRect = SkRect::MakeXYWH(0, 0,
  178. .50f * rectImgs[i]->width(),
  179. .50f * rectImgs[i]->height());
  180. canvas->drawImageRect(rectImgs[i], srcRect, dstRect, &plainPaint,
  181. SkCanvas::kStrict_SrcRectConstraint);
  182. canvas->translate(kWidth * .5f + kPad, 0);
  183. }
  184. canvas->restore();
  185. canvas->translate(0, kPad + 1.5f * kHeight * s);
  186. }
  187. }
  188. return DrawResult::kOk;
  189. }
  190. private:
  191. typedef GM INHERITED;
  192. };
  193. DEF_GM(return new RectangleTexture;)
  194. }