1 /*-------------------------------------------------------------------------
2 * drawElements Quality Program OpenGL ES 3.0 Module
3 * -------------------------------------------------
5 * Copyright 2014 The Android Open Source Project
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
21 * \brief Varying interpolation accuracy tests.
23 * \todo [2012-07-03 pyry] On GLES3 we could use floating-point render target
24 * for better accuracy evaluation.
25 *//*--------------------------------------------------------------------*/
27 #include "es3aVaryingInterpolationTests.hpp"
28 #include "gluPixelTransfer.hpp"
29 #include "gluShaderProgram.hpp"
30 #include "gluShaderUtil.hpp"
31 #include "tcuStringTemplate.hpp"
32 #include "gluContextInfo.hpp"
33 #include "glsTextureTestUtil.hpp"
34 #include "tcuVector.hpp"
35 #include "tcuVectorUtil.hpp"
36 #include "tcuTestLog.hpp"
37 #include "tcuFloat.hpp"
38 #include "tcuImageCompare.hpp"
39 #include "tcuRenderTarget.hpp"
40 #include "deRandom.hpp"
41 #include "deStringUtil.hpp"
52 using tcu::SurfaceAccess;
61 static inline float projectedTriInterpolate (const tcu::Vec3& s, const tcu::Vec3& w, float nx, float ny)
63 return (s[0]*(1.0f-nx-ny)/w[0] + s[1]*ny/w[1] + s[2]*nx/w[2]) / ((1.0f-nx-ny)/w[0] + ny/w[1] + nx/w[2]);
66 static void renderReference (const SurfaceAccess& dst, const float coords[4*3], const Vec4& wCoord, const Vec3& scale, const Vec3& bias)
68 float dstW = (float)dst.getWidth();
69 float dstH = (float)dst.getHeight();
71 Vec3 triR[2] = { Vec3(coords[0*3+0], coords[1*3+0], coords[2*3+0]), Vec3(coords[3*3+0], coords[2*3+0], coords[1*3+0]) };
72 Vec3 triG[2] = { Vec3(coords[0*3+1], coords[1*3+1], coords[2*3+1]), Vec3(coords[3*3+1], coords[2*3+1], coords[1*3+1]) };
73 Vec3 triB[2] = { Vec3(coords[0*3+2], coords[1*3+2], coords[2*3+2]), Vec3(coords[3*3+2], coords[2*3+2], coords[1*3+2]) };
74 tcu::Vec3 triW[2] = { wCoord.swizzle(0, 1, 2), wCoord.swizzle(3, 2, 1) };
76 for (int py = 0; py < dst.getHeight(); py++)
78 for (int px = 0; px < dst.getWidth(); px++)
80 float wx = (float)px + 0.5f;
81 float wy = (float)py + 0.5f;
85 int triNdx = nx + ny >= 1.0f ? 1 : 0;
86 float triNx = triNdx ? 1.0f - nx : nx;
87 float triNy = triNdx ? 1.0f - ny : ny;
89 float r = projectedTriInterpolate(triR[triNdx], triW[triNdx], triNx, triNy) * scale[0] + bias[0];
90 float g = projectedTriInterpolate(triG[triNdx], triW[triNdx], triNx, triNy) * scale[1] + bias[1];
91 float b = projectedTriInterpolate(triB[triNdx], triW[triNdx], triNx, triNy) * scale[2] + bias[2];
93 Vec4 color = Vec4(r, g, b, 1.0f);
95 dst.setPixel(color, px, py);
100 class InterpolationCase : public TestCase
103 InterpolationCase (Context& context, const char* name, const char* desc, glu::Precision precision, const tcu::Vec3& minVal, const tcu::Vec3& maxVal, bool projective);
104 ~InterpolationCase (void);
106 IterateResult iterate (void);
109 glu::Precision m_precision;
115 InterpolationCase::InterpolationCase (Context& context, const char* name, const char* desc, glu::Precision precision, const tcu::Vec3& minVal, const tcu::Vec3& maxVal, bool projective)
116 : TestCase (context, tcu::NODETYPE_ACCURACY, name, desc)
117 , m_precision (precision)
120 , m_projective (projective)
124 InterpolationCase::~InterpolationCase (void)
128 static bool isValidFloat (glu::Precision precision, float val)
130 if (precision == glu::PRECISION_MEDIUMP)
132 tcu::Float16 fp16(val);
133 return !fp16.isDenorm() && !fp16.isInf() && !fp16.isNaN();
137 tcu::Float32 fp32(val);
138 return !fp32.isDenorm() && !fp32.isInf() && !fp32.isNaN();
143 static bool isValidFloatVec (glu::Precision precision, const tcu::Vector<float, Size>& vec)
145 for (int ndx = 0; ndx < Size; ndx++)
147 if (!isValidFloat(precision, vec[ndx]))
153 InterpolationCase::IterateResult InterpolationCase::iterate (void)
155 TestLog& log = m_testCtx.getLog();
156 de::Random rnd (deStringHash(getName()));
157 const tcu::RenderTarget& renderTarget = m_context.getRenderTarget();
158 int viewportWidth = 128;
159 int viewportHeight = 128;
161 if (renderTarget.getWidth() < viewportWidth ||
162 renderTarget.getHeight() < viewportHeight)
163 throw tcu::NotSupportedError("Too small viewport", "", __FILE__, __LINE__);
165 int viewportX = rnd.getInt(0, renderTarget.getWidth() - viewportWidth);
166 int viewportY = rnd.getInt(0, renderTarget.getHeight() - viewportHeight);
168 static const char* s_vertShaderTemplate =
170 "in highp vec4 a_position;\n"
171 "in ${PRECISION} vec3 a_coords;\n"
172 "out ${PRECISION} vec3 v_coords;\n"
176 " gl_Position = a_position;\n"
177 " v_coords = a_coords;\n"
179 static const char* s_fragShaderTemplate =
181 "in ${PRECISION} vec3 v_coords;\n"
182 "uniform ${PRECISION} vec3 u_scale;\n"
183 "uniform ${PRECISION} vec3 u_bias;\n"
184 "layout(location = 0) out ${PRECISION} vec4 o_color;\n"
188 " o_color = vec4(v_coords * u_scale + u_bias, 1.0);\n"
191 map<string, string> templateParams;
192 templateParams["PRECISION"] = glu::getPrecisionName(m_precision);
194 glu::ShaderProgram program(m_context.getRenderContext(),
195 glu::makeVtxFragSources(tcu::StringTemplate(s_vertShaderTemplate).specialize(templateParams),
196 tcu::StringTemplate(s_fragShaderTemplate).specialize(templateParams)));
200 if (m_precision == glu::PRECISION_HIGHP && !m_context.getContextInfo().isFragmentHighPrecisionSupported())
201 m_testCtx.setTestResult(QP_TEST_RESULT_NOT_SUPPORTED, "Fragment highp not supported");
203 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Compile failed");
207 // Position coordinates.
208 Vec4 wCoord = m_projective ? Vec4(1.3f, 0.8f, 0.6f, 2.0f) : Vec4(1.0f, 1.0f, 1.0f, 1.0f);
211 -1.0f*wCoord.x(), -1.0f*wCoord.x(), 0.0f, wCoord.x(),
212 -1.0f*wCoord.y(), +1.0f*wCoord.y(), 0.0f, wCoord.y(),
213 +1.0f*wCoord.z(), -1.0f*wCoord.z(), 0.0f, wCoord.z(),
214 +1.0f*wCoord.w(), +1.0f*wCoord.w(), 0.0f, wCoord.w()
217 // Coordinates for interpolation.
218 tcu::Vec3 scale = 1.0f / (m_max - m_min);
219 tcu::Vec3 bias = -1.0f*m_min*scale;
222 (0.0f - bias[0])/scale[0], (0.5f - bias[1])/scale[1], (1.0f - bias[2])/scale[2],
223 (0.5f - bias[0])/scale[0], (1.0f - bias[1])/scale[1], (0.5f - bias[2])/scale[2],
224 (0.5f - bias[0])/scale[0], (0.0f - bias[1])/scale[1], (0.5f - bias[2])/scale[2],
225 (1.0f - bias[0])/scale[0], (0.5f - bias[1])/scale[1], (0.0f - bias[2])/scale[2]
228 log << TestLog::Message << "a_coords = " << ((tcu::Vec3(0.0f) - bias)/scale) << " -> " << ((tcu::Vec3(1.0f) - bias)/scale) << TestLog::EndMessage;
229 log << TestLog::Message << "u_scale = " << scale << TestLog::EndMessage;
230 log << TestLog::Message << "u_bias = " << bias << TestLog::EndMessage;
232 // Verify that none of the inputs are denormalized / inf / nan.
233 TCU_CHECK(isValidFloatVec(m_precision, scale));
234 TCU_CHECK(isValidFloatVec(m_precision, bias));
235 for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(coords); ndx++)
237 TCU_CHECK(isValidFloat(m_precision, coords[ndx]));
238 TCU_CHECK(isValidFloat(m_precision, coords[ndx] * scale[ndx % 3] + bias[ndx % 3]));
242 static const deUint16 indices[] = { 0, 1, 2, 2, 1, 3 };
245 const int posLoc = glGetAttribLocation(program.getProgram(), "a_position");
246 const int coordLoc = glGetAttribLocation(program.getProgram(), "a_coords");
248 glEnableVertexAttribArray(posLoc);
249 glVertexAttribPointer(posLoc, 4, GL_FLOAT, GL_FALSE, 0, &positions[0]);
251 glEnableVertexAttribArray(coordLoc);
252 glVertexAttribPointer(coordLoc, 3, GL_FLOAT, GL_FALSE, 0, &coords[0]);
255 glUseProgram(program.getProgram());
256 glUniform3f(glGetUniformLocation(program.getProgram(), "u_scale"), scale.x(), scale.y(), scale.z());
257 glUniform3f(glGetUniformLocation(program.getProgram(), "u_bias"), bias.x(), bias.y(), bias.z());
259 GLU_CHECK_MSG("After program setup");
262 tcu::Surface rendered (viewportWidth, viewportHeight);
263 tcu::Surface reference (viewportWidth, viewportHeight);
266 glViewport(viewportX, viewportY, viewportWidth, viewportHeight);
267 glDrawElements(GL_TRIANGLES, DE_LENGTH_OF_ARRAY(indices), GL_UNSIGNED_SHORT, &indices[0]);
269 // Render reference \note While GPU is hopefully doing our draw call.
270 renderReference(SurfaceAccess(reference, m_context.getRenderTarget().getPixelFormat()), coords, wCoord, scale, bias);
272 glu::readPixels(m_context.getRenderContext(), viewportX, viewportY, rendered.getAccess());
274 // Compute difference.
275 const int bestScoreDiff = 16;
276 const int worstScoreDiff = 300;
277 int score = tcu::measurePixelDiffAccuracy(log, "Result", "Image comparison result", reference, rendered, bestScoreDiff, worstScoreDiff, tcu::COMPARE_LOG_EVERYTHING);
279 m_testCtx.setTestResult(QP_TEST_RESULT_PASS, de::toString(score).c_str());
283 VaryingInterpolationTests::VaryingInterpolationTests (Context& context)
284 : TestCaseGroup(context, "interpolation", "Varying Interpolation Accuracy Tests")
288 VaryingInterpolationTests::~VaryingInterpolationTests (void)
292 void VaryingInterpolationTests::init (void)
294 DE_STATIC_ASSERT(glu::PRECISION_LOWP+1 == glu::PRECISION_MEDIUMP);
295 DE_STATIC_ASSERT(glu::PRECISION_MEDIUMP+1 == glu::PRECISION_HIGHP);
297 // Exp = Emax-3, Mantissa = 0
298 float minF32 = tcu::Float32((0u<<31) | (0xfcu<<23) | 0x0u).asFloat();
299 float maxF32 = tcu::Float32((1u<<31) | (0xfcu<<23) | 0x0u).asFloat();
300 float minF16 = tcu::Float16((deUint16)((0u<<15) | (0x1cu<<10) | 0x0u)).asFloat();
301 float maxF16 = tcu::Float16((deUint16)((1u<<15) | (0x1cu<<10) | 0x0u)).asFloat();
308 glu::Precision minPrecision;
311 { "zero_to_one", Vec3( 0.0f, 0.0f, 0.0f), Vec3( 1.0f, 1.0f, 1.0f), glu::PRECISION_LOWP },
312 { "zero_to_minus_one", Vec3( 0.0f, 0.0f, 0.0f), Vec3( -1.0f, -1.0f, -1.0f), glu::PRECISION_LOWP },
313 { "minus_one_to_one", Vec3( -1.0f, -1.0f, -1.0f), Vec3( 1.0f, 1.0f, 1.0f), glu::PRECISION_LOWP },
314 { "minus_ten_to_ten", Vec3(-10.0f, -10.0f, -10.0f), Vec3( 10.0f, 10.0f, 10.0f), glu::PRECISION_MEDIUMP },
315 { "thousands", Vec3( -5e3f, 1e3f, 1e3f), Vec3( 3e3f, -1e3f, 7e3f), glu::PRECISION_MEDIUMP },
316 { "full_mediump", Vec3(minF16, minF16, minF16), Vec3(maxF16, maxF16, maxF16), glu::PRECISION_MEDIUMP },
317 { "full_highp", Vec3(minF32, minF32, minF32), Vec3(maxF32, maxF32, maxF32), glu::PRECISION_HIGHP },
320 for (int precision = glu::PRECISION_LOWP; precision <= glu::PRECISION_HIGHP; precision++)
322 for (int coordNdx = 0; coordNdx < DE_LENGTH_OF_ARRAY(coordRanges); coordNdx++)
324 if (precision < (int)coordRanges[coordNdx].minPrecision)
327 string baseName = string(glu::getPrecisionName((glu::Precision)precision)) + "_" + coordRanges[coordNdx].name;
329 addChild(new InterpolationCase(m_context, baseName.c_str(), "", (glu::Precision)precision, coordRanges[coordNdx].minVal, coordRanges[coordNdx].maxVal, false));
330 addChild(new InterpolationCase(m_context, (baseName + "_proj").c_str(), "", (glu::Precision)precision, coordRanges[coordNdx].minVal, coordRanges[coordNdx].maxVal, true));