1 /*-------------------------------------------------------------------------
2 * drawElements Quality Program OpenGL ES 2.0 Module
3 * -------------------------------------------------
4 *
5 * Copyright 2014 The Android Open Source Project
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 *//*!
20 * \file
21 * \brief Polygon offset tests.
22 *//*--------------------------------------------------------------------*/
23
24 #include "es2fPolygonOffsetTests.hpp"
25 #include "deStringUtil.hpp"
26 #include "deRandom.hpp"
27 #include "gluContextInfo.hpp"
28 #include "gluRenderContext.hpp"
29 #include "gluShaderProgram.hpp"
30 #include "gluPixelTransfer.hpp"
31 #include "gluStrUtil.hpp"
32 #include "glwEnums.hpp"
33 #include "glwDefs.hpp"
34 #include "glwFunctions.hpp"
35 #include "tcuTestContext.hpp"
36 #include "tcuTestLog.hpp"
37 #include "tcuTextureUtil.hpp"
38 #include "tcuRenderTarget.hpp"
39 #include "tcuVectorUtil.hpp"
40 #include "rrRenderer.hpp"
41 #include "rrFragmentOperations.hpp"
42
43 #include "sglrReferenceContext.hpp"
44
45 #include <string>
46 #include <limits>
47
48 using namespace glw; // GLint and other GL types
49
50 namespace deqp
51 {
52 namespace gles2
53 {
54 namespace Functional
55 {
56 namespace
57 {
58
59 const char* s_shaderSourceVertex = "attribute highp vec4 a_position;\n"
60 "attribute highp vec4 a_color;\n"
61 "varying mediump vec4 v_color;\n"
62 "void main (void)\n"
63 "{\n"
64 " gl_Position = a_position;\n"
65 " v_color = a_color;\n"
66 "}\n";
67 const char* s_shaderSourceFragment = "varying mediump vec4 v_color;\n"
68 "void main (void)\n"
69 "{\n"
70 " gl_FragColor = v_color;\n"
71 "}\n";
72
73 static const tcu::Vec4 MASK_COLOR_OK = tcu::Vec4(0.0f, 0.1f, 0.0f, 1.0f);
74 static const tcu::Vec4 MASK_COLOR_DEV = tcu::Vec4(0.8f, 0.5f, 0.0f, 1.0f);
75 static const tcu::Vec4 MASK_COLOR_FAIL = tcu::Vec4(1.0f, 0.0f, 1.0f, 1.0f);
76
compareThreshold(const tcu::IVec4 & a,const tcu::IVec4 & b,const tcu::IVec4 & threshold)77 inline bool compareThreshold (const tcu::IVec4& a, const tcu::IVec4& b, const tcu::IVec4& threshold)
78 {
79 return tcu::boolAll(tcu::lessThanEqual(tcu::abs(a - b), threshold));
80 }
81
82 /*--------------------------------------------------------------------*//*!
83 * \brief Pixelwise comparison of two images.
84 * \note copied & modified from glsRasterizationTests
85 *
86 * Kernel radius defines maximum allowed distance. If radius is 0, only
87 * perfect match is allowed. Radius of 1 gives a 3x3 kernel.
88 *
89 * Return values: -1 = Perfect match
90 * 0 = Deviation within kernel
91 * >0 = Number of faulty pixels
92 *//*--------------------------------------------------------------------*/
compareImages(tcu::TestLog & log,glu::RenderContext & renderCtx,const tcu::ConstPixelBufferAccess & test,const tcu::ConstPixelBufferAccess & ref,const tcu::PixelBufferAccess & diffMask,int radius)93 int compareImages (tcu::TestLog& log, glu::RenderContext& renderCtx, const tcu::ConstPixelBufferAccess& test, const tcu::ConstPixelBufferAccess& ref, const tcu::PixelBufferAccess& diffMask, int radius)
94 {
95 const int height = test.getHeight();
96 const int width = test.getWidth();
97 const int colorThreshold = 128;
98 const tcu::RGBA formatThreshold = renderCtx.getRenderTarget().getPixelFormat().getColorThreshold();
99 const tcu::IVec4 threshold = tcu::IVec4(colorThreshold, colorThreshold, colorThreshold, formatThreshold.getAlpha() > 0 ? colorThreshold : 0)
100 + tcu::IVec4(formatThreshold.getRed(), formatThreshold.getGreen(), formatThreshold.getBlue(), formatThreshold.getAlpha());
101
102 int deviatingPixels = 0;
103 int faultyPixels = 0;
104 int compareFailed = -1;
105
106 tcu::clear(diffMask, MASK_COLOR_OK);
107
108 for (int y = 0; y < height; y++)
109 {
110 for (int x = 0; x < width; x++)
111 {
112 const tcu::IVec4 cRef = ref.getPixelInt(x, y);
113
114 // Pixelwise match, no deviation or fault
115 {
116 const tcu::IVec4 cTest = test.getPixelInt(x, y);
117 if (compareThreshold(cRef, cTest, threshold))
118 continue;
119 }
120
121 // If not, search within kernel radius
122 {
123 const int kYmin = deMax32(y - radius, 0);
124 const int kYmax = deMin32(y + radius, height-1);
125 const int kXmin = deMax32(x - radius, 0);
126 const int kXmax = deMin32(x + radius, width-1);
127 bool found = false;
128
129 for (int kY = kYmin; kY <= kYmax; kY++)
130 for (int kX = kXmin; kX <= kXmax; kX++)
131 {
132 const tcu::IVec4 cTest = test.getPixelInt(kX, kY);
133 if (compareThreshold(cRef, cTest, threshold))
134 found = true;
135 }
136
137 if (found) // The pixel is deviating if the color is found inside the kernel
138 {
139 diffMask.setPixel(MASK_COLOR_DEV, x, y);
140 if (compareFailed == -1)
141 compareFailed = 0;
142 deviatingPixels++;
143 continue;
144 }
145 }
146
147 diffMask.setPixel(MASK_COLOR_FAIL, x, y);
148 faultyPixels++; // The pixel is faulty if the color is not found
149 compareFailed = 1;
150 }
151 }
152
153 log << tcu::TestLog::Message << faultyPixels << " faulty pixel(s) found." << tcu::TestLog::EndMessage;
154
155 return (compareFailed == 1 ? faultyPixels : compareFailed);
156 }
157
verifyImages(tcu::TestLog & log,tcu::TestContext & testCtx,glu::RenderContext & renderCtx,const tcu::ConstPixelBufferAccess & testImage,const tcu::ConstPixelBufferAccess & referenceImage)158 void verifyImages (tcu::TestLog& log, tcu::TestContext& testCtx, glu::RenderContext& renderCtx, const tcu::ConstPixelBufferAccess& testImage, const tcu::ConstPixelBufferAccess& referenceImage)
159 {
160 using tcu::TestLog;
161
162 const int kernelRadius = 1;
163 const int faultyPixelLimit = 20;
164 int faultyPixels;
165 tcu::Surface diffMask (testImage.getWidth(), testImage.getHeight());
166
167 faultyPixels = compareImages(log, renderCtx, referenceImage, testImage, diffMask.getAccess(), kernelRadius);
168
169 if (faultyPixels > faultyPixelLimit)
170 {
171 log << TestLog::ImageSet("Images", "Image comparison");
172 log << TestLog::Image("Test image", "Test image", testImage);
173 log << TestLog::Image("Reference image", "Reference image", referenceImage);
174 log << TestLog::Image("Difference mask", "Difference mask", diffMask.getAccess());
175 log << TestLog::EndImageSet;
176
177 log << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
178 testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
179 }
180 }
181
verifyError(tcu::TestContext & testCtx,const glw::Functions & gl,GLenum expected)182 void verifyError (tcu::TestContext& testCtx, const glw::Functions& gl, GLenum expected)
183 {
184 deUint32 got = gl.getError();
185 if (got != expected)
186 {
187 testCtx.getLog() << tcu::TestLog::Message << "// ERROR: expected " << glu::getErrorStr(expected) << "; got " << glu::getErrorStr(got) << tcu::TestLog::EndMessage;
188 if (testCtx.getTestResult() == QP_TEST_RESULT_PASS)
189 testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got invalid error");
190 }
191 }
192
checkCanvasSize(int width,int height,int minWidth,int minHeight)193 void checkCanvasSize (int width, int height, int minWidth, int minHeight)
194 {
195 if (width < minWidth || height < minHeight)
196 throw tcu::NotSupportedError(std::string("Render context size must be at least ") + de::toString(minWidth) + "x" + de::toString(minWidth));
197 }
198
199 class PositionColorShader : public sglr::ShaderProgram
200 {
201 public:
202 enum
203 {
204 VARYINGLOC_COLOR = 0
205 };
206
207 PositionColorShader (void);
208 void shadeVertices (const rr::VertexAttrib* inputs, rr::VertexPacket* const* packets, const int numPackets) const;
209 void shadeFragments (rr::FragmentPacket* packets, const int numPackets, const rr::FragmentShadingContext& context) const;
210 };
211
PositionColorShader(void)212 PositionColorShader::PositionColorShader (void)
213 : sglr::ShaderProgram(sglr::pdec::ShaderProgramDeclaration()
214 << sglr::pdec::VertexAttribute("a_position", rr::GENERICVECTYPE_FLOAT)
215 << sglr::pdec::VertexAttribute("a_color", rr::GENERICVECTYPE_FLOAT)
216 << sglr::pdec::VertexToFragmentVarying(rr::GENERICVECTYPE_FLOAT)
217 << sglr::pdec::FragmentOutput(rr::GENERICVECTYPE_FLOAT)
218 << sglr::pdec::VertexSource(s_shaderSourceVertex)
219 << sglr::pdec::FragmentSource(s_shaderSourceFragment))
220 {
221 }
222
shadeVertices(const rr::VertexAttrib * inputs,rr::VertexPacket * const * packets,const int numPackets) const223 void PositionColorShader::shadeVertices (const rr::VertexAttrib* inputs, rr::VertexPacket* const* packets, const int numPackets) const
224 {
225 for (int packetNdx = 0; packetNdx < numPackets; ++packetNdx)
226 {
227 const int positionAttrLoc = 0;
228 const int colorAttrLoc = 1;
229
230 rr::VertexPacket& packet = *packets[packetNdx];
231
232 // Transform to position
233 packet.position = rr::readVertexAttribFloat(inputs[positionAttrLoc], packet.instanceNdx, packet.vertexNdx);
234
235 // Pass color to FS
236 packet.outputs[VARYINGLOC_COLOR] = rr::readVertexAttribFloat(inputs[colorAttrLoc], packet.instanceNdx, packet.vertexNdx);
237 }
238 }
239
shadeFragments(rr::FragmentPacket * packets,const int numPackets,const rr::FragmentShadingContext & context) const240 void PositionColorShader::shadeFragments (rr::FragmentPacket* packets, const int numPackets, const rr::FragmentShadingContext& context) const
241 {
242 for (int packetNdx = 0; packetNdx < numPackets; ++packetNdx)
243 {
244 rr::FragmentPacket& packet = packets[packetNdx];
245
246 for (int fragNdx = 0; fragNdx < 4; ++fragNdx)
247 rr::writeFragmentOutput(context, packetNdx, fragNdx, 0, rr::readTriangleVarying<float>(packet, context, VARYINGLOC_COLOR, fragNdx));
248 }
249 }
250
251 // PolygonOffsetTestCase
252
253 class PolygonOffsetTestCase : public TestCase
254 {
255 public:
256 PolygonOffsetTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName, int canvasSize);
257
258 virtual void testPolygonOffset (void) = DE_NULL;
259 IterateResult iterate (void);
260
261 protected:
262 const GLenum m_internalFormat;
263 const char* m_internalFormatName;
264 const int m_targetSize;
265 };
266
PolygonOffsetTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName,int canvasSize)267 PolygonOffsetTestCase::PolygonOffsetTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName, int canvasSize)
268 : TestCase (context, name, description)
269 , m_internalFormat (internalFormat)
270 , m_internalFormatName (internalFormatName)
271 , m_targetSize (canvasSize)
272 {
273 }
274
iterate(void)275 PolygonOffsetTestCase::IterateResult PolygonOffsetTestCase::iterate (void)
276 {
277 m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
278 m_testCtx.getLog() << tcu::TestLog::Message << "Testing PolygonOffset with " << m_internalFormatName << " depth buffer." << tcu::TestLog::EndMessage;
279
280 if (m_internalFormat == 0)
281 {
282 // default framebuffer
283 const int width = m_context.getRenderTarget().getWidth();
284 const int height = m_context.getRenderTarget().getHeight();
285
286 checkCanvasSize(width, height, m_targetSize, m_targetSize);
287
288 if (m_context.getRenderTarget().getDepthBits() == 0)
289 throw tcu::NotSupportedError("polygon offset tests require depth buffer");
290
291 testPolygonOffset();
292 }
293 else
294 {
295 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
296
297 // framebuffer object
298 GLuint colorRboId = 0;
299 GLuint depthRboId = 0;
300 GLuint fboId = 0;
301 bool fboComplete;
302
303 gl.genRenderbuffers(1, &colorRboId);
304 gl.bindRenderbuffer(GL_RENDERBUFFER, colorRboId);
305 gl.renderbufferStorage(GL_RENDERBUFFER, GL_RGBA4, m_targetSize, m_targetSize);
306 verifyError(m_testCtx, gl, GL_NO_ERROR);
307
308 gl.genRenderbuffers(1, &depthRboId);
309 gl.bindRenderbuffer(GL_RENDERBUFFER, depthRboId);
310 gl.renderbufferStorage(GL_RENDERBUFFER, m_internalFormat, m_targetSize, m_targetSize);
311 verifyError(m_testCtx, gl, GL_NO_ERROR);
312
313 gl.genFramebuffers(1, &fboId);
314 gl.bindFramebuffer(GL_FRAMEBUFFER, fboId);
315 gl.framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorRboId);
316 gl.framebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRboId);
317 verifyError(m_testCtx, gl, GL_NO_ERROR);
318
319 fboComplete = gl.checkFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
320
321 if (fboComplete)
322 testPolygonOffset();
323
324 gl.deleteFramebuffers(1, &fboId);
325 gl.deleteRenderbuffers(1, &depthRboId);
326 gl.deleteRenderbuffers(1, &colorRboId);
327
328 if (!fboComplete)
329 throw tcu::NotSupportedError("could not create fbo for testing.");
330 }
331
332 return STOP;
333 }
334
335 // UsageTestCase
336
337 class UsageTestCase : public PolygonOffsetTestCase
338 {
339 public:
340 UsageTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
341
342 void testPolygonOffset (void);
343 };
344
UsageTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)345 UsageTestCase::UsageTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
346 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
347 {
348 }
349
testPolygonOffset(void)350 void UsageTestCase::testPolygonOffset (void)
351 {
352 using tcu::TestLog;
353
354 const tcu::Vec4 triangle[] =
355 {
356 tcu::Vec4(-1, 1, 0, 1),
357 tcu::Vec4( 1, 1, 0, 1),
358 tcu::Vec4( 1, -1, 0, 1),
359 };
360
361 tcu::TestLog& log = m_testCtx.getLog();
362 tcu::Surface testImage (m_targetSize, m_targetSize);
363 tcu::Surface referenceImage (m_targetSize, m_targetSize);
364
365 // render test image
366 {
367 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
368 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
369 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
370 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
371
372 if (!program.isOk())
373 {
374 log << program;
375 TCU_FAIL("Shader compile failed.");
376 }
377
378 gl.clearColor (0, 0, 0, 1);
379 gl.clearDepthf (1.0f);
380 gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
381 gl.viewport (0, 0, m_targetSize, m_targetSize);
382 gl.useProgram (program.getProgram());
383 gl.enable (GL_DEPTH_TEST);
384 gl.depthFunc (GL_LEQUAL); // make test pass if polygon offset doesn't do anything. It has its own test case. This test is only for to detect always-on cases.
385
386 log << TestLog::Message << "DepthFunc = GL_LEQUAL" << TestLog::EndMessage;
387
388 gl.enableVertexAttribArray (positionLoc);
389 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangle);
390
391 //draw back (offset disabled)
392
393 log << TestLog::Message << "Draw bottom-right. Color = White.\tState: PolygonOffset(0, -2), POLYGON_OFFSET_FILL disabled." << TestLog::EndMessage;
394
395 gl.polygonOffset (0, -2);
396 gl.disable (GL_POLYGON_OFFSET_FILL);
397 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
398 gl.drawArrays (GL_TRIANGLES, 0, 3);
399
400 //draw front
401
402 log << TestLog::Message << "Draw bottom-right. Color = Red.\tState: PolygonOffset(0, -1), POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
403
404 gl.polygonOffset (0, -1);
405 gl.enable (GL_POLYGON_OFFSET_FILL);
406 gl.vertexAttrib4f (colorLoc, 1.0f, 0.0f, 0.0f, 1.0f);
407 gl.drawArrays (GL_TRIANGLES, 0, 3);
408
409 gl.disableVertexAttribArray (positionLoc);
410 gl.useProgram (0);
411 gl.finish ();
412
413 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
414 }
415
416 // render reference image
417 {
418 rr::Renderer referenceRenderer;
419 rr::VertexAttrib attribs[2];
420 rr::RenderState state((rr::ViewportState)(rr::WindowRectangle(0, 0, m_targetSize, m_targetSize)));
421
422 PositionColorShader program;
423
424 attribs[0].type = rr::VERTEXATTRIBTYPE_FLOAT;
425 attribs[0].size = 4;
426 attribs[0].stride = 0;
427 attribs[0].instanceDivisor = 0;
428 attribs[0].pointer = triangle;
429
430 attribs[1].type = rr::VERTEXATTRIBTYPE_DONT_CARE;
431 attribs[1].generic = tcu::Vec4(1.0f, 0.0f, 0.0f, 1.0f);
432
433 tcu::clear(referenceImage.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
434
435 log << TestLog::Message << "Expecting: Bottom-right = Red." << TestLog::EndMessage;
436
437 referenceRenderer.draw(
438 rr::DrawCommand(
439 state,
440 rr::RenderTarget(rr::MultisamplePixelBufferAccess::fromSinglesampleAccess(referenceImage.getAccess())),
441 rr::Program(program.getVertexShader(), program.getFragmentShader()),
442 2,
443 attribs,
444 rr::PrimitiveList(rr::PRIMITIVETYPE_TRIANGLES, 3, 0)));
445 }
446
447 // compare
448 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
449 }
450
451 // UsageDisplacementTestCase
452
453 class UsageDisplacementTestCase : public PolygonOffsetTestCase
454 {
455 public:
456 UsageDisplacementTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
457
458 private:
459 tcu::Vec4 genRandomVec4 (de::Random& rnd) const;
460 void testPolygonOffset (void);
461 };
462
UsageDisplacementTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)463 UsageDisplacementTestCase::UsageDisplacementTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
464 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
465 {
466 }
467
genRandomVec4(de::Random & rnd) const468 tcu::Vec4 UsageDisplacementTestCase::genRandomVec4 (de::Random& rnd) const
469 {
470 // generater triangle endpoint with following properties
471 // 1) it will not be clipped
472 // 2) it is not near either far or near plane to prevent possible problems related to depth clamping
473 // => w >= 1.0 and z in (-0.9, 0.9) range
474 tcu::Vec4 retVal;
475
476 retVal.x() = rnd.getFloat(-1, 1);
477 retVal.y() = rnd.getFloat(-1, 1);
478 retVal.z() = rnd.getFloat(-0.9f, 0.9f);
479 retVal.w() = 1.0f + rnd.getFloat();
480
481 return retVal;
482 }
483
testPolygonOffset(void)484 void UsageDisplacementTestCase::testPolygonOffset (void)
485 {
486 using tcu::TestLog;
487
488 de::Random rnd (0xdec0de);
489 tcu::TestLog& log = m_testCtx.getLog();
490 tcu::Surface testImage (m_targetSize, m_targetSize);
491 tcu::Surface referenceImage (m_targetSize, m_targetSize);
492
493 // render test image
494 {
495 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
496 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
497 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
498 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
499 const int numIterations = 40;
500
501 if (!program.isOk())
502 {
503 log << program;
504 TCU_FAIL("Shader compile failed.");
505 }
506
507 gl.clearColor (0, 0, 0, 1);
508 gl.clearDepthf (1.0f);
509 gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
510 gl.viewport (0, 0, m_targetSize, m_targetSize);
511 gl.useProgram (program.getProgram());
512 gl.enable (GL_DEPTH_TEST);
513 gl.enable (GL_POLYGON_OFFSET_FILL);
514 gl.enableVertexAttribArray (positionLoc);
515 gl.vertexAttrib4f (colorLoc, 0.0f, 1.0f, 0.0f, 1.0f);
516
517 log << TestLog::Message << "Framebuffer cleared, clear color = Black." << TestLog::EndMessage;
518 log << TestLog::Message << "POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
519
520 // draw colorless (mask = 0,0,0) triangle at random* location, set offset and render green triangle with depthfunc = equal
521 // *) w >= 1.0 and z in (-1, 1) range
522 for (int iterationNdx = 0; iterationNdx < numIterations; ++iterationNdx)
523 {
524 const bool offsetDirection = rnd.getBool();
525 const float offset = offsetDirection ? -1.0f : 1.0f;
526 tcu::Vec4 triangle[3];
527
528 for (int vertexNdx = 0; vertexNdx < DE_LENGTH_OF_ARRAY(triangle); ++vertexNdx)
529 triangle[vertexNdx] = genRandomVec4(rnd);
530
531 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangle);
532
533 log << TestLog::Message << "Setup triangle with random coordinates:" << TestLog::EndMessage;
534 for (size_t ndx = 0; ndx < DE_LENGTH_OF_ARRAY(triangle); ++ndx)
535 log << TestLog::Message
536 << "\tx=" << triangle[ndx].x()
537 << "\ty=" << triangle[ndx].y()
538 << "\tz=" << triangle[ndx].z()
539 << "\tw=" << triangle[ndx].w()
540 << TestLog::EndMessage;
541
542 log << TestLog::Message << "Draw colorless triangle.\tState: DepthFunc = GL_ALWAYS, PolygonOffset(0, 0)." << TestLog::EndMessage;
543
544 gl.depthFunc (GL_ALWAYS);
545 gl.polygonOffset (0, 0);
546 gl.colorMask (GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
547 gl.drawArrays (GL_TRIANGLES, 0, 3);
548
549 // all fragments should have different Z => DepthFunc == GL_EQUAL fails with every fragment
550
551 log << TestLog::Message << "Draw green triangle.\tState: DepthFunc = GL_EQUAL, PolygonOffset(0, " << offset << ")." << TestLog::EndMessage;
552
553 gl.depthFunc (GL_EQUAL);
554 gl.polygonOffset (0, offset);
555 gl.colorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
556 gl.drawArrays (GL_TRIANGLES, 0, 3);
557
558 log << TestLog::Message << TestLog::EndMessage; // empty line for clarity
559 }
560
561 gl.disableVertexAttribArray (positionLoc);
562 gl.useProgram (0);
563 gl.finish ();
564
565 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
566 }
567
568 // render reference image
569 log << TestLog::Message << "Expecting black framebuffer." << TestLog::EndMessage;
570 tcu::clear(referenceImage.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
571
572 // compare
573 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
574 }
575
576 // UsagePositiveNegativeTestCase
577
578 class UsagePositiveNegativeTestCase : public PolygonOffsetTestCase
579 {
580 public:
581 UsagePositiveNegativeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
582
583 void testPolygonOffset (void);
584 };
585
UsagePositiveNegativeTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)586 UsagePositiveNegativeTestCase::UsagePositiveNegativeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
587 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
588 {
589 }
590
testPolygonOffset(void)591 void UsagePositiveNegativeTestCase::testPolygonOffset (void)
592 {
593 using tcu::TestLog;
594
595 const tcu::Vec4 triangleBottomRight[] =
596 {
597 tcu::Vec4(-1, 1, 0, 1),
598 tcu::Vec4( 1, 1, 0, 1),
599 tcu::Vec4( 1, -1, 0, 1),
600 };
601 const tcu::Vec4 triangleTopLeft[] =
602 {
603 tcu::Vec4(-1, -1, 0, 1),
604 tcu::Vec4(-1, 1, 0, 1),
605 tcu::Vec4( 1, -1, 0, 1),
606 };
607
608 tcu::TestLog& log = m_testCtx.getLog();
609 tcu::Surface testImage (m_targetSize, m_targetSize);
610 tcu::Surface referenceImage (m_targetSize, m_targetSize);
611
612 // render test image
613 {
614 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
615 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
616 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
617 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
618
619 if (!program.isOk())
620 {
621 log << program;
622 TCU_FAIL("Shader compile failed.");
623 }
624
625 gl.clearColor (0, 0, 0, 1);
626 gl.clearDepthf (1.0f);
627 gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
628 gl.viewport (0, 0, m_targetSize, m_targetSize);
629 gl.depthFunc (GL_LESS);
630 gl.useProgram (program.getProgram());
631 gl.enable (GL_DEPTH_TEST);
632 gl.enable (GL_POLYGON_OFFSET_FILL);
633 gl.enableVertexAttribArray (positionLoc);
634
635 log << TestLog::Message << "DepthFunc = GL_LESS." << TestLog::EndMessage;
636 log << TestLog::Message << "POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
637
638 //draw top left (negative offset test)
639 {
640 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangleTopLeft);
641
642 log << TestLog::Message << "Draw top-left. Color = White.\tState: PolygonOffset(0, 0)." << TestLog::EndMessage;
643
644 gl.polygonOffset (0, 0);
645 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
646 gl.drawArrays (GL_TRIANGLES, 0, 3);
647
648 log << TestLog::Message << "Draw top-left. Color = Green.\tState: PolygonOffset(0, -1)." << TestLog::EndMessage;
649
650 gl.polygonOffset (0, -1);
651 gl.vertexAttrib4f (colorLoc, 0.0f, 1.0f, 0.0f, 1.0f);
652 gl.drawArrays (GL_TRIANGLES, 0, 3);
653 }
654
655 //draw bottom right (positive offset test)
656 {
657 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangleBottomRight);
658
659 log << TestLog::Message << "Draw bottom-right. Color = White.\tState: PolygonOffset(0, 1)." << TestLog::EndMessage;
660
661 gl.polygonOffset (0, 1);
662 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
663 gl.drawArrays (GL_TRIANGLES, 0, 3);
664
665 log << TestLog::Message << "Draw bottom-right. Color = Yellow.\tState: PolygonOffset(0, 0)." << TestLog::EndMessage;
666
667 gl.polygonOffset (0, 0);
668 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 0.0f, 1.0f);
669 gl.drawArrays (GL_TRIANGLES, 0, 3);
670 }
671
672 gl.disableVertexAttribArray (positionLoc);
673 gl.useProgram (0);
674 gl.finish ();
675
676 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
677 }
678
679 // render reference image
680 {
681 rr::Renderer referenceRenderer;
682 rr::VertexAttrib attribs[2];
683 rr::RenderState state((rr::ViewportState)(rr::WindowRectangle(0, 0, m_targetSize, m_targetSize)));
684
685 PositionColorShader program;
686
687 attribs[0].type = rr::VERTEXATTRIBTYPE_FLOAT;
688 attribs[0].size = 4;
689 attribs[0].stride = 0;
690 attribs[0].instanceDivisor = 0;
691 attribs[0].pointer = triangleTopLeft;
692
693 attribs[1].type = rr::VERTEXATTRIBTYPE_DONT_CARE;
694 attribs[1].generic = tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f);
695
696 tcu::clear(referenceImage.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
697
698 log << TestLog::Message << "Expecting: Top-left = Green, Bottom-right = Yellow." << TestLog::EndMessage;
699
700 referenceRenderer.draw(
701 rr::DrawCommand(
702 state,
703 rr::RenderTarget(rr::MultisamplePixelBufferAccess::fromSinglesampleAccess(referenceImage.getAccess())),
704 rr::Program(program.getVertexShader(), program.getFragmentShader()),
705 2,
706 attribs,
707 rr::PrimitiveList(rr::PRIMITIVETYPE_TRIANGLES, 3, 0)));
708
709 attribs[0].pointer = triangleBottomRight;
710 attribs[1].generic = tcu::Vec4(1.0f, 1.0f, 0.0f, 1.0f);
711
712 referenceRenderer.draw(
713 rr::DrawCommand(
714 state,
715 rr::RenderTarget(rr::MultisamplePixelBufferAccess::fromSinglesampleAccess(referenceImage.getAccess())),
716 rr::Program(program.getVertexShader(), program.getFragmentShader()),
717 2,
718 attribs,
719 rr::PrimitiveList(rr::PRIMITIVETYPE_TRIANGLES, 3, 0)));
720 }
721
722 // compare
723 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
724 }
725
726 // ResultClampingTestCase
727
728 class ResultClampingTestCase : public PolygonOffsetTestCase
729 {
730 public:
731 ResultClampingTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
732
733 void testPolygonOffset (void);
734 };
735
ResultClampingTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)736 ResultClampingTestCase::ResultClampingTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
737 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
738 {
739 }
740
testPolygonOffset(void)741 void ResultClampingTestCase::testPolygonOffset (void)
742 {
743 using tcu::TestLog;
744
745 const tcu::Vec4 triangleBottomRight[] =
746 {
747 tcu::Vec4(-1, 1, 1, 1),
748 tcu::Vec4( 1, 1, 1, 1),
749 tcu::Vec4( 1, -1, 1, 1),
750 };
751 const tcu::Vec4 triangleTopLeft[] =
752 {
753 tcu::Vec4(-1, -1, -1, 1),
754 tcu::Vec4(-1, 1, -1, 1),
755 tcu::Vec4( 1, -1, -1, 1),
756 };
757
758 tcu::TestLog& log = m_testCtx.getLog();
759 tcu::Surface testImage (m_targetSize, m_targetSize);
760 tcu::Surface referenceImage (m_targetSize, m_targetSize);
761
762 // render test image
763 {
764 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
765 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
766 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
767 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
768
769 if (!program.isOk())
770 {
771 log << program;
772 TCU_FAIL("Shader compile failed.");
773 }
774
775 gl.clearColor (0, 0, 0, 1);
776 gl.clearDepthf (1.0f);
777 gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
778 gl.viewport (0, 0, m_targetSize, m_targetSize);
779 gl.useProgram (program.getProgram());
780 gl.enable (GL_DEPTH_TEST);
781 gl.enable (GL_POLYGON_OFFSET_FILL);
782 gl.enableVertexAttribArray (positionLoc);
783
784 log << TestLog::Message << "POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
785
786 //draw bottom right (far)
787 {
788 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangleBottomRight);
789
790 log << TestLog::Message << "Draw bottom-right. Color = White.\tState: DepthFunc = ALWAYS, PolygonOffset(0, 8), Polygon Z = 1.0. (Result depth should clamp to 1.0)." << TestLog::EndMessage;
791
792 gl.depthFunc (GL_ALWAYS);
793 gl.polygonOffset (0, 8);
794 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
795 gl.drawArrays (GL_TRIANGLES, 0, 3);
796
797 log << TestLog::Message << "Draw bottom-right. Color = Red.\tState: DepthFunc = GREATER, PolygonOffset(0, 9), Polygon Z = 1.0. (Result depth should clamp to 1.0 too)" << TestLog::EndMessage;
798
799 gl.depthFunc (GL_GREATER);
800 gl.polygonOffset (0, 9);
801 gl.vertexAttrib4f (colorLoc, 1.0f, 0.0f, 0.0f, 1.0f);
802 gl.drawArrays (GL_TRIANGLES, 0, 3);
803 }
804
805 //draw top left (near)
806 {
807 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangleTopLeft);
808
809 log << TestLog::Message << "Draw top-left. Color = White.\tState: DepthFunc = ALWAYS, PolygonOffset(0, -8), Polygon Z = -1.0. (Result depth should clamp to -1.0)" << TestLog::EndMessage;
810
811 gl.depthFunc (GL_ALWAYS);
812 gl.polygonOffset (0, -8);
813 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
814 gl.drawArrays (GL_TRIANGLES, 0, 3);
815
816 log << TestLog::Message << "Draw top-left. Color = Yellow.\tState: DepthFunc = LESS, PolygonOffset(0, -9), Polygon Z = -1.0. (Result depth should clamp to -1.0 too)." << TestLog::EndMessage;
817
818 gl.depthFunc (GL_LESS);
819 gl.polygonOffset (0, -9);
820 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 0.0f, 1.0f);
821 gl.drawArrays (GL_TRIANGLES, 0, 3);
822 }
823
824 gl.disableVertexAttribArray (positionLoc);
825 gl.useProgram (0);
826 gl.finish ();
827
828 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
829 }
830
831 // render reference image
832 log << TestLog::Message << "Expecting: Top-left = White, Bottom-right = White." << TestLog::EndMessage;
833 tcu::clear(referenceImage.getAccess(), tcu::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
834
835 // compare
836 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
837 }
838
839 // UsageSlopeTestCase
840
841 class UsageSlopeTestCase : public PolygonOffsetTestCase
842 {
843 public:
844 UsageSlopeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
845
846 void testPolygonOffset (void);
847 };
848
UsageSlopeTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)849 UsageSlopeTestCase::UsageSlopeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
850 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
851 {
852 }
853
testPolygonOffset(void)854 void UsageSlopeTestCase::testPolygonOffset (void)
855 {
856 using tcu::TestLog;
857
858 const tcu::Vec4 triangleBottomRight[] =
859 {
860 tcu::Vec4(-1, 1, 0.0f, 1),
861 tcu::Vec4( 1, 1, 0.9f, 1),
862 tcu::Vec4( 1, -1, 0.9f, 1),
863 };
864 const tcu::Vec4 triangleTopLeft[] =
865 {
866 tcu::Vec4(-1, -1, -0.9f, 1),
867 tcu::Vec4(-1, 1, 0.9f, 1),
868 tcu::Vec4( 1, -1, 0.0f, 1),
869 };
870
871 tcu::TestLog& log = m_testCtx.getLog();
872 tcu::Surface testImage (m_targetSize, m_targetSize);
873 tcu::Surface referenceImage (m_targetSize, m_targetSize);
874
875 // render test image
876 {
877 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
878 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
879 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
880 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
881
882 if (!program.isOk())
883 {
884 log << program;
885 TCU_FAIL("Shader compile failed.");
886 }
887
888 gl.clearColor (0, 0, 0, 1);
889 gl.clearDepthf (1.0f);
890 gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
891 gl.viewport (0, 0, m_targetSize, m_targetSize);
892 gl.useProgram (program.getProgram());
893 gl.enable (GL_DEPTH_TEST);
894 gl.enable (GL_POLYGON_OFFSET_FILL);
895 gl.enableVertexAttribArray (positionLoc);
896
897 log << TestLog::Message << "POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
898
899 //draw top left (negative offset test)
900 {
901 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangleTopLeft);
902
903 log << TestLog::Message << "Draw top-left. Color = White.\tState: DepthFunc = ALWAYS, PolygonOffset(0, 0)." << TestLog::EndMessage;
904
905 gl.depthFunc (GL_ALWAYS);
906 gl.polygonOffset (0, 0);
907 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
908 gl.drawArrays (GL_TRIANGLES, 0, 3);
909
910 log << TestLog::Message << "Draw top-left. Color = Green.\tState: DepthFunc = LESS, PolygonOffset(-1, 0)." << TestLog::EndMessage;
911
912 gl.depthFunc (GL_LESS);
913 gl.polygonOffset (-1, 0);
914 gl.vertexAttrib4f (colorLoc, 0.0f, 1.0f, 0.0f, 1.0f);
915 gl.drawArrays (GL_TRIANGLES, 0, 3);
916 }
917
918 //draw bottom right (positive offset test)
919 {
920 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangleBottomRight);
921
922 log << TestLog::Message << "Draw bottom-right. Color = White.\tState: DepthFunc = ALWAYS, PolygonOffset(0, 0)." << TestLog::EndMessage;
923
924 gl.depthFunc (GL_ALWAYS);
925 gl.polygonOffset (0, 0);
926 gl.vertexAttrib4f (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
927 gl.drawArrays (GL_TRIANGLES, 0, 3);
928
929 log << TestLog::Message << "Draw bottom-right. Color = Green.\tState: DepthFunc = GREATER, PolygonOffset(1, 0)." << TestLog::EndMessage;
930
931 gl.depthFunc (GL_GREATER);
932 gl.polygonOffset (1, 0);
933 gl.vertexAttrib4f (colorLoc, 0.0f, 1.0f, 0.0f, 1.0f);
934 gl.drawArrays (GL_TRIANGLES, 0, 3);
935 }
936
937 gl.disableVertexAttribArray (positionLoc);
938 gl.useProgram (0);
939 gl.finish ();
940
941 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
942 }
943
944 // render reference image
945 log << TestLog::Message << "Expecting: Top-left = Green, Bottom-right = Green." << TestLog::EndMessage;
946 tcu::clear(referenceImage.getAccess(), tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f));
947
948 // compare
949 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
950 }
951
952 // ZeroSlopeTestCase
953
954 class ZeroSlopeTestCase : public PolygonOffsetTestCase
955 {
956 public:
957 ZeroSlopeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
958
959 void testPolygonOffset (void);
960 };
961
ZeroSlopeTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)962 ZeroSlopeTestCase::ZeroSlopeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
963 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
964 {
965 }
966
testPolygonOffset(void)967 void ZeroSlopeTestCase::testPolygonOffset (void)
968 {
969 using tcu::TestLog;
970
971 const tcu::Vec4 triangle[] =
972 {
973 tcu::Vec4(-0.4f, 0.4f, 0.0f, 1.0f),
974 tcu::Vec4(-0.8f, -0.5f, 0.0f, 1.0f),
975 tcu::Vec4( 0.7f, 0.2f, 0.0f, 1.0f),
976 };
977
978 tcu::TestLog& log = m_testCtx.getLog();
979 tcu::Surface testImage (m_targetSize, m_targetSize);
980 tcu::Surface referenceImage (m_targetSize, m_targetSize);
981
982 // log the triangle
983 log << TestLog::Message << "Setup triangle with coordinates:" << TestLog::EndMessage;
984 for (size_t ndx = 0; ndx < DE_LENGTH_OF_ARRAY(triangle); ++ndx)
985 log << TestLog::Message
986 << "\tx=" << triangle[ndx].x()
987 << "\ty=" << triangle[ndx].y()
988 << "\tz=" << triangle[ndx].z()
989 << "\tw=" << triangle[ndx].w()
990 << TestLog::EndMessage;
991
992 // render test image
993 {
994 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
995 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
996 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
997 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
998
999 if (!program.isOk())
1000 {
1001 log << program;
1002 TCU_FAIL("Shader compile failed.");
1003 }
1004
1005 gl.clearColor (0, 0, 0, 1);
1006 gl.clearDepthf (1.0f);
1007 gl.clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
1008 gl.viewport (0, 0, m_targetSize, m_targetSize);
1009 gl.useProgram (program.getProgram());
1010 gl.enable (GL_DEPTH_TEST);
1011 gl.enable (GL_POLYGON_OFFSET_FILL);
1012 gl.enableVertexAttribArray (positionLoc);
1013
1014 log << TestLog::Message << "POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
1015
1016 {
1017 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangle);
1018
1019 log << TestLog::Message << "Draw triangle. Color = Red.\tState: DepthFunc = ALWAYS, PolygonOffset(0, 0)." << TestLog::EndMessage;
1020
1021 gl.depthFunc (GL_ALWAYS);
1022 gl.polygonOffset (0, 0);
1023 gl.vertexAttrib4f (colorLoc, 1.0f, 0.0f, 0.0f, 1.0f);
1024 gl.drawArrays (GL_TRIANGLES, 0, 3);
1025
1026 log << TestLog::Message << "Draw triangle. Color = Black.\tState: DepthFunc = EQUAL, PolygonOffset(4, 0)." << TestLog::EndMessage;
1027
1028 gl.depthFunc (GL_EQUAL);
1029 gl.polygonOffset (4, 0); // triangle slope == 0
1030 gl.vertexAttrib4f (colorLoc, 0.0f, 0.0f, 0.0f, 1.0f);
1031 gl.drawArrays (GL_TRIANGLES, 0, 3);
1032 }
1033
1034 gl.disableVertexAttribArray (positionLoc);
1035 gl.useProgram (0);
1036 gl.finish ();
1037
1038 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
1039 }
1040
1041 // render reference image
1042 log << TestLog::Message << "Expecting black triangle." << TestLog::EndMessage;
1043 tcu::clear(referenceImage.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
1044
1045 // compare
1046 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
1047 }
1048
1049 // OneSlopeTestCase
1050
1051 class OneSlopeTestCase : public PolygonOffsetTestCase
1052 {
1053 public:
1054 OneSlopeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName);
1055
1056 void testPolygonOffset (void);
1057 };
1058
OneSlopeTestCase(Context & context,const char * name,const char * description,GLenum internalFormat,const char * internalFormatName)1059 OneSlopeTestCase::OneSlopeTestCase (Context& context, const char* name, const char* description, GLenum internalFormat, const char* internalFormatName)
1060 : PolygonOffsetTestCase(context, name, description, internalFormat, internalFormatName, 200)
1061 {
1062 }
1063
testPolygonOffset(void)1064 void OneSlopeTestCase::testPolygonOffset (void)
1065 {
1066 using tcu::TestLog;
1067
1068 /*
1069 * setup vertices subject to following properties
1070 * dz_w / dx_w == 1
1071 * dz_w / dy_w == 0
1072 * or
1073 * dz_w / dx_w == 0
1074 * dz_w / dy_w == 1
1075 * ==> m == 1
1076 */
1077 const float cornerDepth = float(m_targetSize);
1078 const tcu::Vec4 triangles[2][3] =
1079 {
1080 {
1081 tcu::Vec4(-1, -1, -cornerDepth, 1),
1082 tcu::Vec4(-1, 1, -cornerDepth, 1),
1083 tcu::Vec4( 1, -1, cornerDepth, 1),
1084 },
1085 {
1086 tcu::Vec4(-1, 1, cornerDepth, 1),
1087 tcu::Vec4( 1, 1, cornerDepth, 1),
1088 tcu::Vec4( 1, -1, -cornerDepth, 1),
1089 },
1090 };
1091
1092 tcu::TestLog& log = m_testCtx.getLog();
1093 tcu::Surface testImage (m_targetSize, m_targetSize);
1094 tcu::Surface referenceImage (m_targetSize, m_targetSize);
1095
1096 // log triangle info
1097 log << TestLog::Message << "Setup triangle0 coordinates: (slope in window coordinates = 1.0)" << TestLog::EndMessage;
1098 for (size_t ndx = 0; ndx < DE_LENGTH_OF_ARRAY(triangles[0]); ++ndx)
1099 log << TestLog::Message
1100 << "\tx=" << triangles[0][ndx].x()
1101 << "\ty=" << triangles[0][ndx].y()
1102 << "\tz=" << triangles[0][ndx].z()
1103 << "\tw=" << triangles[0][ndx].w()
1104 << TestLog::EndMessage;
1105 log << TestLog::Message << "Setup triangle1 coordinates: (slope in window coordinates = 1.0)" << TestLog::EndMessage;
1106 for (size_t ndx = 0; ndx < DE_LENGTH_OF_ARRAY(triangles[1]); ++ndx)
1107 log << TestLog::Message
1108 << "\tx=" << triangles[1][ndx].x()
1109 << "\ty=" << triangles[1][ndx].y()
1110 << "\tz=" << triangles[1][ndx].z()
1111 << "\tw=" << triangles[1][ndx].w()
1112 << TestLog::EndMessage;
1113
1114 // render test image
1115 {
1116 const glw::Functions& gl = m_context.getRenderContext().getFunctions();
1117 const glu::ShaderProgram program (m_context.getRenderContext(), glu::makeVtxFragSources(s_shaderSourceVertex, s_shaderSourceFragment));
1118 const GLint positionLoc = gl.getAttribLocation(program.getProgram(), "a_position");
1119 const GLint colorLoc = gl.getAttribLocation(program.getProgram(), "a_color");
1120
1121 if (!program.isOk())
1122 {
1123 log << program;
1124 TCU_FAIL("Shader compile failed.");
1125 }
1126
1127 gl.clearColor (0, 0, 0, 1);
1128 gl.clear (GL_COLOR_BUFFER_BIT);
1129 gl.viewport (0, 0, m_targetSize, m_targetSize);
1130 gl.useProgram (program.getProgram());
1131 gl.enable (GL_DEPTH_TEST);
1132 gl.enable (GL_POLYGON_OFFSET_FILL);
1133 gl.enableVertexAttribArray (positionLoc);
1134
1135 log << TestLog::Message << "Framebuffer cleared, clear color = Black." << TestLog::EndMessage;
1136 log << TestLog::Message << "POLYGON_OFFSET_FILL enabled." << TestLog::EndMessage;
1137
1138 // top left (positive offset)
1139 {
1140 log << TestLog::Message << "Clear depth to 1.0." << TestLog::EndMessage;
1141
1142 gl.clearDepthf (1.0f); // far
1143 gl.clear (GL_DEPTH_BUFFER_BIT);
1144
1145 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangles[0]);
1146
1147 log << TestLog::Message << "Draw triangle0. Color = Red.\tState: DepthFunc = NOTEQUAL, PolygonOffset(10, 0). (Result depth should clamp to 1.0)." << TestLog::EndMessage;
1148
1149 gl.polygonOffset (10, 0); // clamps any depth on the triangle to 1
1150 gl.depthFunc (GL_NOTEQUAL);
1151 gl.vertexAttrib4f (colorLoc, 1.0f, 0.0f, 0.0f, 1.0f);
1152 gl.drawArrays (GL_TRIANGLES, 0, 3);
1153 }
1154 // bottom right (negative offset)
1155 {
1156 log << TestLog::Message << "Clear depth to 0.0." << TestLog::EndMessage;
1157
1158 gl.clearDepthf (0.0f); // far
1159 gl.clear (GL_DEPTH_BUFFER_BIT);
1160
1161 gl.vertexAttribPointer (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, triangles[1]);
1162
1163 log << TestLog::Message << "Draw triangle1. Color = Green.\tState: DepthFunc = NOTEQUAL, PolygonOffset(-10, 0). (Result depth should clamp to 0.0)." << TestLog::EndMessage;
1164
1165 gl.polygonOffset (-10, 0); // clamps depth to 0
1166 gl.depthFunc (GL_NOTEQUAL);
1167 gl.vertexAttrib4f (colorLoc, 0.0f, 1.0f, 0.0f, 1.0f);
1168 gl.drawArrays (GL_TRIANGLES, 0, 3);
1169 }
1170
1171 gl.disableVertexAttribArray (positionLoc);
1172 gl.useProgram (0);
1173 gl.finish ();
1174
1175 glu::readPixels(m_context.getRenderContext(), 0, 0, testImage.getAccess());
1176 }
1177
1178 // render reference image
1179 log << TestLog::Message << "Expecting black framebuffer." << TestLog::EndMessage;
1180 tcu::clear(referenceImage.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
1181
1182 // compare
1183 verifyImages(log, m_testCtx, m_context.getRenderContext(), testImage.getAccess(), referenceImage.getAccess());
1184 }
1185
1186 } // anonymous
1187
PolygonOffsetTests(Context & context)1188 PolygonOffsetTests::PolygonOffsetTests (Context& context)
1189 : TestCaseGroup(context, "polygon_offset", "Polygon offset tests")
1190 {
1191 }
1192
~PolygonOffsetTests(void)1193 PolygonOffsetTests::~PolygonOffsetTests (void)
1194 {
1195 }
1196
init(void)1197 void PolygonOffsetTests::init (void)
1198 {
1199 const struct DepthBufferFormat
1200 {
1201 enum BufferType
1202 {
1203 TYPE_FIXED_POINT,
1204 TYPE_FLOATING_POINT,
1205 TYPE_UNKNOWN
1206 };
1207
1208 GLenum internalFormat;
1209 int bits;
1210 BufferType floatingPoint;
1211 const char* name;
1212 } depthFormats[]=
1213 {
1214 { 0, 0, DepthBufferFormat::TYPE_UNKNOWN, "default" },
1215 { GL_DEPTH_COMPONENT16, 16, DepthBufferFormat::TYPE_FIXED_POINT, "fixed16" },
1216 };
1217
1218 for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(depthFormats); ++ndx)
1219 {
1220 const DepthBufferFormat& format = depthFormats[ndx];
1221
1222 // enable works?
1223 addChild(new UsageTestCase(m_context, (std::string(format.name) + "_enable").c_str(), "test enable GL_POLYGON_OFFSET_FILL", format.internalFormat, format.name));
1224
1225 // Really moves the polygons ?
1226 addChild(new UsageDisplacementTestCase(m_context, (std::string(format.name) + "_displacement_with_units").c_str(), "test polygon offset", format.internalFormat, format.name));
1227
1228 // Really moves the polygons to right direction ?
1229 addChild(new UsagePositiveNegativeTestCase(m_context, (std::string(format.name) + "_render_with_units").c_str(), "test polygon offset", format.internalFormat, format.name));
1230
1231 // Is total result clamped to [0,1] like promised?
1232 addChild(new ResultClampingTestCase(m_context, (std::string(format.name) + "_result_depth_clamp").c_str(), "test polygon offset clamping", format.internalFormat, format.name));
1233
1234 // Slope really moves the polygon?
1235 addChild(new UsageSlopeTestCase(m_context, (std::string(format.name) + "_render_with_factor").c_str(), "test polygon offset factor", format.internalFormat, format.name));
1236
1237 // Factor with zero slope
1238 addChild(new ZeroSlopeTestCase(m_context, (std::string(format.name) + "_factor_0_slope").c_str(), "test polygon offset factor", format.internalFormat, format.name));
1239
1240 // Factor with 1.0 slope
1241 addChild(new OneSlopeTestCase(m_context, (std::string(format.name) + "_factor_1_slope").c_str(), "test polygon offset factor", format.internalFormat, format.name));
1242 }
1243 }
1244
1245 } // Functional
1246 } // gles2
1247 } // deqp
1248