| // |
| // Copyright 2015 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| #include "test_utils/ANGLETest.h" |
| #include "test_utils/gl_raii.h" |
| |
| using namespace angle; |
| |
| namespace |
| { |
| enum Geometry |
| { |
| Quad, |
| Point, |
| TriFan, |
| }; |
| enum Storage |
| { |
| Buffer, |
| Memory |
| }; |
| enum Draw |
| { |
| Indexed, |
| NonIndexed |
| }; |
| enum Vendor |
| { |
| Angle, |
| Ext |
| }; |
| } // namespace |
| |
| class InstancingTest : public ANGLETest |
| { |
| protected: |
| InstancingTest() |
| { |
| setWindowWidth(256); |
| setWindowHeight(256); |
| setConfigRedBits(8); |
| setConfigGreenBits(8); |
| setConfigBlueBits(8); |
| setConfigAlphaBits(8); |
| } |
| |
| void testTearDown() override |
| { |
| glDeleteBuffers(1, &mInstanceBuffer); |
| glDeleteProgram(mProgram[0]); |
| glDeleteProgram(mProgram[1]); |
| } |
| |
| void testSetUp() override |
| { |
| for (unsigned i = 0; i < kMaxDrawn; ++i) |
| { |
| mInstanceData[i] = i * kDrawSize; |
| } |
| glGenBuffers(1, &mInstanceBuffer); |
| glBindBuffer(GL_ARRAY_BUFFER, mInstanceBuffer); |
| glBufferData(GL_ARRAY_BUFFER, sizeof(mInstanceData), mInstanceData, GL_STATIC_DRAW); |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| |
| const std::string inst = "attribute float a_instance;"; |
| const std::string pos = "attribute vec2 a_position;"; |
| const std::string main = R"( |
| void main() |
| { |
| gl_PointSize = 6.0; |
| gl_Position = vec4(a_position.x, a_position.y + a_instance, 0, 1); |
| } |
| )"; |
| |
| // attrib 0 is instanced |
| const std::string inst0 = inst + pos + main; |
| mProgram[0] = CompileProgram(inst0.c_str(), essl1_shaders::fs::Red()); |
| ASSERT_NE(0u, mProgram[0]); |
| ASSERT_EQ(0, glGetAttribLocation(mProgram[0], "a_instance")); |
| ASSERT_EQ(1, glGetAttribLocation(mProgram[0], "a_position")); |
| |
| // attrib 1 is instanced |
| const std::string inst1 = pos + inst + main; |
| mProgram[1] = CompileProgram(inst1.c_str(), essl1_shaders::fs::Red()); |
| ASSERT_NE(0u, mProgram[1]); |
| ASSERT_EQ(1, glGetAttribLocation(mProgram[1], "a_instance")); |
| ASSERT_EQ(0, glGetAttribLocation(mProgram[1], "a_position")); |
| |
| glClearColor(0.0f, 0.0f, 1.0f, 1.0f); |
| } |
| |
| void runTest(unsigned numInstance, |
| unsigned divisor, |
| const int instanceAttrib, // which attrib is instanced: 0 or 1 |
| Geometry geometry, |
| Draw draw, |
| Storage storage, |
| Vendor vendor, |
| unsigned offset) // for NonIndexed/DrawArrays only |
| { |
| if (vendor == Angle) |
| { |
| ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_ANGLE_instanced_arrays")); |
| } |
| else if (vendor == Ext) |
| { |
| ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_instanced_arrays")); |
| } |
| |
| // TODO: Fix these. http://anglebug.com/3129 |
| ANGLE_SKIP_TEST_IF(IsD3D9() && draw == Indexed && geometry == Point); |
| ANGLE_SKIP_TEST_IF(IsD3D9() && IsAMD()); |
| |
| // D3D11 FL9_3 has a special codepath that emulates instanced points rendering |
| // but it has bugs and was only implemented for vertex positions in a buffer object, |
| // not client memory as used in this test. |
| ANGLE_SKIP_TEST_IF(IsD3D11_FL93() && geometry == Point); |
| |
| // Unknown problem. FL9_3 is not officially supported anyway. |
| ANGLE_SKIP_TEST_IF(IsD3D11_FL93() && geometry == Quad && draw == NonIndexed); |
| |
| // The window is divided into kMaxDrawn slices of size kDrawSize. |
| // The slice drawn into is determined by the instance datum. |
| // The instance data array selects all the slices in order. |
| // 'lastDrawn' is the index (zero-based) of the last slice into which we draw. |
| const unsigned lastDrawn = (numInstance - 1) / divisor; |
| |
| // Ensure the numInstance and divisor parameters are valid. |
| ASSERT_TRUE(lastDrawn < kMaxDrawn); |
| |
| ASSERT_TRUE(instanceAttrib == 0 || instanceAttrib == 1); |
| const int positionAttrib = 1 - instanceAttrib; |
| |
| glUseProgram(mProgram[instanceAttrib]); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, storage == Buffer ? mInstanceBuffer : 0); |
| glVertexAttribPointer(instanceAttrib, 1, GL_FLOAT, GL_FALSE, 0, |
| storage == Buffer ? nullptr : mInstanceData); |
| glEnableVertexAttribArray(instanceAttrib); |
| if (vendor == Angle) |
| glVertexAttribDivisorANGLE(instanceAttrib, divisor); |
| else if (vendor == Ext) |
| glVertexAttribDivisorEXT(instanceAttrib, divisor); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| const void *vertices; |
| switch (geometry) |
| { |
| case Point: |
| vertices = kPointVertices; |
| break; |
| case Quad: |
| vertices = kQuadVertices; |
| break; |
| case TriFan: |
| vertices = kTriFanVertices; |
| break; |
| } |
| glVertexAttribPointer(positionAttrib, 2, GL_FLOAT, GL_FALSE, 0, vertices); |
| glEnableVertexAttribArray(positionAttrib); |
| if (vendor == Angle) |
| glVertexAttribDivisorANGLE(positionAttrib, 0); |
| else if (vendor == Ext) |
| glVertexAttribDivisorEXT(positionAttrib, 0); |
| |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| if (geometry == Point) |
| { |
| if (draw == Indexed) |
| if (vendor == Angle) |
| glDrawElementsInstancedANGLE(GL_POINTS, ArraySize(kPointIndices), |
| GL_UNSIGNED_SHORT, kPointIndices, numInstance); |
| else |
| glDrawElementsInstancedEXT(GL_POINTS, ArraySize(kPointIndices), |
| GL_UNSIGNED_SHORT, kPointIndices, numInstance); |
| else if (vendor == Angle) |
| glDrawArraysInstancedANGLE(GL_POINTS, offset, 4 /*vertices*/, numInstance); |
| else |
| glDrawArraysInstancedEXT(GL_POINTS, offset, 4 /*vertices*/, numInstance); |
| } |
| else if (geometry == Quad) |
| { |
| if (draw == Indexed) |
| if (vendor == Angle) |
| glDrawElementsInstancedANGLE(GL_TRIANGLES, ArraySize(kQuadIndices), |
| GL_UNSIGNED_SHORT, kQuadIndices, numInstance); |
| else |
| glDrawElementsInstancedEXT(GL_TRIANGLES, ArraySize(kQuadIndices), |
| GL_UNSIGNED_SHORT, kQuadIndices, numInstance); |
| else if (vendor == Angle) |
| glDrawArraysInstancedANGLE(GL_TRIANGLES, offset, 6 /*vertices*/, numInstance); |
| else |
| glDrawArraysInstancedEXT(GL_TRIANGLES, offset, 6 /*vertices*/, numInstance); |
| } |
| else if (geometry == TriFan) |
| { |
| if (draw == Indexed) |
| { |
| if (storage == Buffer) |
| { |
| GLBuffer indexBuffer; |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer); |
| glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(kTriFanIndices), kTriFanIndices, |
| GL_STATIC_DRAW); |
| |
| if (vendor == Angle) |
| glDrawElementsInstancedANGLE(GL_TRIANGLE_FAN, ArraySize(kTriFanIndices), |
| GL_UNSIGNED_BYTE, 0, numInstance); |
| else |
| glDrawElementsInstancedEXT(GL_TRIANGLE_FAN, ArraySize(kTriFanIndices), |
| GL_UNSIGNED_BYTE, 0, numInstance); |
| } |
| else |
| { |
| if (vendor == Angle) |
| glDrawElementsInstancedANGLE(GL_TRIANGLE_FAN, ArraySize(kTriFanIndices), |
| GL_UNSIGNED_BYTE, kTriFanIndices, numInstance); |
| else |
| glDrawElementsInstancedEXT(GL_TRIANGLE_FAN, ArraySize(kTriFanIndices), |
| GL_UNSIGNED_BYTE, kTriFanIndices, numInstance); |
| } |
| } |
| else if (vendor == Angle) |
| glDrawArraysInstancedANGLE(GL_TRIANGLE_FAN, offset, 8 /*vertices*/, numInstance); |
| else |
| glDrawArraysInstancedEXT(GL_TRIANGLE_FAN, offset, 8 /*vertices*/, numInstance); |
| } |
| |
| ASSERT_GL_NO_ERROR(); |
| checkDrawing(lastDrawn); |
| } |
| |
| void checkDrawing(unsigned lastDrawn) |
| { |
| for (unsigned i = 0; i < kMaxDrawn; ++i) |
| { |
| float y = |
| -1.0f + static_cast<float>(kDrawSize) / 2.0f + static_cast<float>(i * kDrawSize); |
| int iy = static_cast<int>((y + 1.0f) / 2.0f * getWindowHeight()); |
| for (unsigned j = 0; j < 8; j += 2) |
| { |
| int ix = static_cast<int>((kPointVertices[j] + 1.0f) / 2.0f * getWindowWidth()); |
| EXPECT_PIXEL_COLOR_EQ(ix, iy, i <= lastDrawn ? GLColor::red : GLColor::blue) |
| << std::endl; |
| } |
| } |
| } |
| |
| GLuint mProgram[2]; |
| GLuint mInstanceBuffer; |
| |
| static constexpr unsigned kMaxDrawn = 16; |
| static constexpr float kDrawSize = 2.0 / kMaxDrawn; |
| GLfloat mInstanceData[kMaxDrawn]; |
| |
| // clang-format off |
| |
| // Vertices 0-5 are two triangles that form a quad filling the first "slice" of the window. |
| // See above about slices. Vertices 4-9 are the same two triangles. |
| static constexpr GLfloat kQuadVertices[] = { |
| -1, -1, |
| 1, -1, |
| -1, -1 + kDrawSize, |
| 1, -1, |
| 1, -1 + kDrawSize, |
| -1, -1 + kDrawSize, |
| 1, -1, |
| 1, -1, |
| -1, -1 + kDrawSize, |
| -1, -1, |
| }; |
| |
| // Vertices 0-7 form a quad (triangle fan) filling the first "slice" of the window. |
| // Vertices 8-15 are the same. |
| static constexpr GLfloat kTriFanVertices[] = { |
| -1, -1, |
| 1, -1, |
| 1, -1 + 0.5f * kDrawSize, |
| 1, -1 + kDrawSize, |
| 0.5f, -1 + kDrawSize, |
| 0, -1 + kDrawSize, |
| -0.5f, -1 + kDrawSize, |
| -1, -1 + kDrawSize, |
| |
| -1, -1, |
| 1, -1, |
| 1, -1 + 0.5f * kDrawSize, |
| 1, -1 + kDrawSize, |
| 0.5f, -1 + kDrawSize, |
| 0, -1 + kDrawSize, |
| -0.5f, -1 + kDrawSize, |
| -1, -1 + kDrawSize, |
| }; |
| |
| // Points 0-3 are spread across the first "slice." |
| // Points 2-4 are the same. |
| static constexpr GLfloat kPointVertices[] = { |
| -0.6f, -1 + kDrawSize / 2.0, |
| -0.2f, -1 + kDrawSize / 2.0, |
| 0.2f, -1 + kDrawSize / 2.0, |
| 0.6f, -1 + kDrawSize / 2.0, |
| -0.2f, -1 + kDrawSize / 2.0, |
| -0.6f, -1 + kDrawSize / 2.0, |
| }; |
| // clang-format on |
| |
| // Same two triangles as described above. |
| static constexpr GLushort kQuadIndices[] = {2, 9, 7, 5, 6, 4}; |
| |
| // Same triangle fan as described above. |
| static constexpr GLubyte kTriFanIndices[] = {0, 9, 10, 3, 4, 5, 14, 7}; |
| |
| // Same four points as described above. |
| static constexpr GLushort kPointIndices[] = {1, 5, 3, 2}; |
| }; |
| |
| constexpr unsigned InstancingTest::kMaxDrawn; |
| constexpr float InstancingTest::kDrawSize; |
| constexpr GLfloat InstancingTest::kQuadVertices[]; |
| constexpr GLfloat InstancingTest::kTriFanVertices[]; |
| constexpr GLfloat InstancingTest::kPointVertices[]; |
| constexpr GLushort InstancingTest::kQuadIndices[]; |
| constexpr GLubyte InstancingTest::kTriFanIndices[]; |
| constexpr GLushort InstancingTest::kPointIndices[]; |
| |
| #define TEST_INDEXED(attrib, geometry, storage, vendor) \ |
| TEST_P(InstancingTest, IndexedAttrib##attrib##geometry##storage##vendor) \ |
| { \ |
| runTest(11, 2, attrib, geometry, Indexed, storage, vendor, 0); \ |
| } |
| |
| #define TEST_NONINDEXED(attrib, geometry, storage, vendor, offset) \ |
| TEST_P(InstancingTest, NonIndexedAttrib##attrib##geometry##storage##vendor##Offset##offset) \ |
| { \ |
| runTest(11, 2, attrib, geometry, NonIndexed, storage, vendor, offset); \ |
| } |
| |
| #define TEST_DIVISOR(numInstance, divisor) \ |
| TEST_P(InstancingTest, Instances##numInstance##Divisor##divisor) \ |
| { \ |
| runTest(numInstance, divisor, 1, Quad, NonIndexed, Buffer, Angle, 0); \ |
| } |
| |
| // D3D9 and D3D11 FL9_3, have a special codepath that rearranges the input layout sent to D3D, |
| // to ensure that slot/stream zero of the input layout doesn't contain per-instance data, so |
| // we test with attribute 0 being instanced, as will as attribute 1 being instanced. |
| // |
| // Tests with a non-zero 'offset' check that "first" parameter to glDrawArraysInstancedANGLE is only |
| // an offset into the non-instanced vertex attributes. |
| TEST_INDEXED(0, TriFan, Buffer, Angle) |
| TEST_INDEXED(0, TriFan, Memory, Angle) |
| TEST_INDEXED(1, TriFan, Buffer, Angle) |
| TEST_INDEXED(1, TriFan, Memory, Angle) |
| TEST_INDEXED(0, TriFan, Buffer, Ext) |
| TEST_INDEXED(0, TriFan, Memory, Ext) |
| TEST_INDEXED(1, TriFan, Buffer, Ext) |
| TEST_INDEXED(1, TriFan, Memory, Ext) |
| TEST_INDEXED(0, Quad, Buffer, Angle) |
| TEST_INDEXED(0, Quad, Memory, Angle) |
| TEST_INDEXED(1, Quad, Buffer, Angle) |
| TEST_INDEXED(1, Quad, Memory, Angle) |
| TEST_INDEXED(0, Point, Buffer, Angle) |
| TEST_INDEXED(0, Point, Memory, Angle) |
| TEST_INDEXED(1, Point, Buffer, Angle) |
| TEST_INDEXED(1, Point, Memory, Angle) |
| TEST_INDEXED(0, Quad, Buffer, Ext) |
| TEST_INDEXED(0, Quad, Memory, Ext) |
| TEST_INDEXED(1, Quad, Buffer, Ext) |
| TEST_INDEXED(1, Quad, Memory, Ext) |
| TEST_INDEXED(0, Point, Buffer, Ext) |
| TEST_INDEXED(0, Point, Memory, Ext) |
| TEST_INDEXED(1, Point, Buffer, Ext) |
| TEST_INDEXED(1, Point, Memory, Ext) |
| |
| // offset should be 0 or 4 for quads, 0 or 8 for triangle fan |
| TEST_NONINDEXED(0, TriFan, Buffer, Angle, 0) |
| TEST_NONINDEXED(0, TriFan, Buffer, Angle, 8) |
| TEST_NONINDEXED(0, TriFan, Memory, Angle, 0) |
| TEST_NONINDEXED(0, TriFan, Memory, Angle, 8) |
| TEST_NONINDEXED(1, TriFan, Buffer, Angle, 0) |
| TEST_NONINDEXED(1, TriFan, Buffer, Angle, 8) |
| TEST_NONINDEXED(1, TriFan, Memory, Angle, 0) |
| TEST_NONINDEXED(1, TriFan, Memory, Angle, 8) |
| TEST_NONINDEXED(0, TriFan, Buffer, Ext, 0) |
| TEST_NONINDEXED(0, TriFan, Buffer, Ext, 8) |
| TEST_NONINDEXED(0, TriFan, Memory, Ext, 0) |
| TEST_NONINDEXED(0, TriFan, Memory, Ext, 8) |
| TEST_NONINDEXED(1, TriFan, Buffer, Ext, 0) |
| TEST_NONINDEXED(1, TriFan, Buffer, Ext, 8) |
| TEST_NONINDEXED(1, TriFan, Memory, Ext, 0) |
| TEST_NONINDEXED(1, TriFan, Memory, Ext, 8) |
| TEST_NONINDEXED(0, Quad, Buffer, Angle, 0) |
| TEST_NONINDEXED(0, Quad, Buffer, Angle, 4) |
| TEST_NONINDEXED(0, Quad, Memory, Angle, 0) |
| TEST_NONINDEXED(0, Quad, Memory, Angle, 4) |
| TEST_NONINDEXED(1, Quad, Buffer, Angle, 0) |
| TEST_NONINDEXED(1, Quad, Buffer, Angle, 4) |
| TEST_NONINDEXED(1, Quad, Memory, Angle, 0) |
| TEST_NONINDEXED(1, Quad, Memory, Angle, 4) |
| TEST_NONINDEXED(0, Quad, Buffer, Ext, 0) |
| TEST_NONINDEXED(0, Quad, Buffer, Ext, 4) |
| TEST_NONINDEXED(0, Quad, Memory, Ext, 0) |
| TEST_NONINDEXED(0, Quad, Memory, Ext, 4) |
| TEST_NONINDEXED(1, Quad, Buffer, Ext, 0) |
| TEST_NONINDEXED(1, Quad, Buffer, Ext, 4) |
| TEST_NONINDEXED(1, Quad, Memory, Ext, 0) |
| TEST_NONINDEXED(1, Quad, Memory, Ext, 4) |
| |
| // offset should be 0 or 2 for points |
| TEST_NONINDEXED(0, Point, Buffer, Angle, 0) |
| TEST_NONINDEXED(0, Point, Buffer, Angle, 2) |
| TEST_NONINDEXED(0, Point, Memory, Angle, 0) |
| TEST_NONINDEXED(0, Point, Memory, Angle, 2) |
| TEST_NONINDEXED(1, Point, Buffer, Angle, 0) |
| TEST_NONINDEXED(1, Point, Buffer, Angle, 2) |
| TEST_NONINDEXED(1, Point, Memory, Angle, 0) |
| TEST_NONINDEXED(1, Point, Memory, Angle, 2) |
| TEST_NONINDEXED(0, Point, Buffer, Ext, 0) |
| TEST_NONINDEXED(0, Point, Buffer, Ext, 2) |
| TEST_NONINDEXED(0, Point, Memory, Ext, 0) |
| TEST_NONINDEXED(0, Point, Memory, Ext, 2) |
| TEST_NONINDEXED(1, Point, Buffer, Ext, 0) |
| TEST_NONINDEXED(1, Point, Buffer, Ext, 2) |
| TEST_NONINDEXED(1, Point, Memory, Ext, 0) |
| TEST_NONINDEXED(1, Point, Memory, Ext, 2) |
| |
| // The following tests produce each value of 'lastDrawn' in runTest() from 1 to kMaxDrawn, a few |
| // different ways. |
| TEST_DIVISOR(1, 1) |
| TEST_DIVISOR(1, 2) |
| TEST_DIVISOR(2, 1) |
| TEST_DIVISOR(3, 1) |
| TEST_DIVISOR(3, 2) |
| TEST_DIVISOR(4, 1) |
| TEST_DIVISOR(5, 1) |
| TEST_DIVISOR(5, 2) |
| TEST_DIVISOR(6, 1) |
| TEST_DIVISOR(6, 2) |
| TEST_DIVISOR(7, 1) |
| TEST_DIVISOR(7, 2) |
| TEST_DIVISOR(8, 1) |
| TEST_DIVISOR(8, 2) |
| TEST_DIVISOR(8, 4) |
| TEST_DIVISOR(9, 1) |
| TEST_DIVISOR(9, 2) |
| TEST_DIVISOR(10, 1) |
| TEST_DIVISOR(11, 1) |
| TEST_DIVISOR(11, 2) |
| TEST_DIVISOR(12, 1) |
| TEST_DIVISOR(12, 11) |
| TEST_DIVISOR(13, 1) |
| TEST_DIVISOR(13, 2) |
| TEST_DIVISOR(14, 1) |
| TEST_DIVISOR(15, 1) |
| TEST_DIVISOR(15, 2) |
| TEST_DIVISOR(16, 1) |
| TEST_DIVISOR(16, 3) |
| TEST_DIVISOR(16, 7) |
| TEST_DIVISOR(17, 2) |
| TEST_DIVISOR(20, 2) |
| TEST_DIVISOR(21, 2) |
| TEST_DIVISOR(23, 2) |
| TEST_DIVISOR(25, 5) |
| TEST_DIVISOR(25, 33) |
| TEST_DIVISOR(26, 2) |
| TEST_DIVISOR(26, 3) |
| TEST_DIVISOR(27, 2) |
| TEST_DIVISOR(27, 4) |
| TEST_DIVISOR(28, 3) |
| TEST_DIVISOR(29, 2) |
| TEST_DIVISOR(29, 11) |
| TEST_DIVISOR(30, 4) |
| TEST_DIVISOR(31, 6) |
| TEST_DIVISOR(32, 2) |
| TEST_DIVISOR(32, 3) |
| TEST_DIVISOR(32, 8) |
| TEST_DIVISOR(34, 3) |
| TEST_DIVISOR(34, 30) |
| |
| // Test line loop instanced draw |
| TEST_P(InstancingTest, LineLoop) |
| { |
| ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_ANGLE_instanced_arrays")); |
| |
| constexpr char kVS[] = R"( |
| attribute vec2 a_position; |
| // x,y = offset, z = scale |
| attribute vec3 a_transform; |
| |
| invariant gl_Position; |
| void main() |
| { |
| vec2 v_position = a_transform.z * a_position + a_transform.xy; |
| gl_Position = vec4(v_position, 0.0, 1.0); |
| })"; |
| |
| constexpr char kFS[] = R"( |
| precision highp float; |
| void main() |
| { |
| gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| })"; |
| |
| ANGLE_GL_PROGRAM(program, kVS, kFS); |
| glBindAttribLocation(program, 0, "a_position"); |
| glBindAttribLocation(program, 1, "a_transform"); |
| glLinkProgram(program); |
| glUseProgram(program); |
| ASSERT_GL_NO_ERROR(); |
| |
| constexpr GLfloat vertices[] = { |
| 0.1, 0.1, -0.1, 0.1, -0.1, -0.1, 0.1, -0.1, |
| }; |
| |
| constexpr GLfloat transform[] = { |
| 0, 0, 9, 0.2, 0.1, 2, 0.5, -0.2, 3, -0.8, -0.5, 1, -0.4, 0.4, 6, |
| }; |
| |
| constexpr GLushort lineloopAsStripIndices[] = {0, 1, 2, 3, 0}; |
| |
| constexpr GLsizei instances = ArraySize(transform) / 3; |
| |
| std::vector<GLColor> expectedPixels(getWindowWidth() * getWindowHeight()); |
| |
| // Draw in non-instanced way |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| glEnableVertexAttribArray(0); |
| glDisableVertexAttribArray(1); |
| |
| glVertexAttribDivisorANGLE(0, 0); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); |
| glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, vertices); |
| |
| for (size_t i = 0; i < instances; ++i) |
| { |
| glVertexAttrib3fv(1, transform + 3 * i); |
| |
| glDrawElements(GL_LINE_STRIP, ArraySize(lineloopAsStripIndices), GL_UNSIGNED_SHORT, |
| lineloopAsStripIndices); |
| } |
| |
| glReadPixels(0, 0, getWindowWidth(), getWindowHeight(), GL_RGBA, GL_UNSIGNED_BYTE, |
| expectedPixels.data()); |
| ASSERT_GL_NO_ERROR(); |
| |
| // Draw in instanced way: |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| GLBuffer vertexBuffer[2]; |
| GLBuffer indexBuffer; |
| |
| glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer); |
| glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(lineloopAsStripIndices), lineloopAsStripIndices, |
| GL_STATIC_DRAW); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer[0]); |
| glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); |
| glEnableVertexAttribArray(0); |
| glVertexAttribDivisorANGLE(0, 0); |
| glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer[1]); |
| glBufferData(GL_ARRAY_BUFFER, sizeof(transform), transform, GL_STATIC_DRAW); |
| glEnableVertexAttribArray(1); |
| glVertexAttribDivisorANGLE(1, 1); |
| glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, 0); |
| |
| glDrawArraysInstancedANGLE(GL_LINE_LOOP, 0, ArraySize(vertices) / 2, instances); |
| |
| std::vector<GLColor> actualPixels(getWindowWidth() * getWindowHeight()); |
| glReadPixels(0, 0, getWindowWidth(), getWindowHeight(), GL_RGBA, GL_UNSIGNED_BYTE, |
| actualPixels.data()); |
| EXPECT_EQ(expectedPixels, actualPixels); |
| |
| glClear(GL_COLOR_BUFFER_BIT); |
| glDrawElementsInstancedANGLE(GL_LINE_LOOP, ArraySize(lineloopAsStripIndices) - 1, |
| GL_UNSIGNED_SHORT, 0, instances); |
| |
| glReadPixels(0, 0, getWindowWidth(), getWindowHeight(), GL_RGBA, GL_UNSIGNED_BYTE, |
| actualPixels.data()); |
| EXPECT_EQ(expectedPixels, actualPixels); |
| } |
| |
| class InstancingTestES3 : public InstancingTest |
| { |
| public: |
| InstancingTestES3() {} |
| }; |
| |
| class InstancingTestES31 : public InstancingTest |
| { |
| public: |
| InstancingTestES31() {} |
| }; |
| |
| // Verify that VertexAttribDivisor can update both binding divisor and attribBinding. |
| TEST_P(InstancingTestES31, UpdateAttribBindingByVertexAttribDivisor) |
| { |
| ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_ANGLE_instanced_arrays")); |
| |
| glUseProgram(mProgram[0]); |
| |
| // Get the attribute locations |
| GLint positionLoc = glGetAttribLocation(mProgram[0], "a_position"); |
| GLint instancePosLoc = glGetAttribLocation(mProgram[0], "a_instance"); |
| ASSERT_NE(-1, positionLoc); |
| ASSERT_NE(-1, instancePosLoc); |
| ASSERT_GL_NO_ERROR(); |
| |
| GLuint vao; |
| glGenVertexArrays(1, &vao); |
| glBindVertexArray(vao); |
| |
| GLBuffer quadBuffer; |
| glBindBuffer(GL_ARRAY_BUFFER, quadBuffer); |
| glBufferData(GL_ARRAY_BUFFER, sizeof(kQuadVertices), kQuadVertices, GL_STATIC_DRAW); |
| |
| const unsigned numInstance = 4; |
| const unsigned divisor = 1; |
| const unsigned lastDrawn = (numInstance - 1) / divisor; |
| |
| // Ensure the numInstance and divisor parameters are valid. |
| ASSERT_TRUE(lastDrawn < kMaxDrawn); |
| |
| // Set the formats by VertexAttribFormat |
| glVertexAttribFormat(positionLoc, 2, GL_FLOAT, GL_FALSE, 0); |
| glVertexAttribFormat(instancePosLoc, 1, GL_FLOAT, GL_FALSE, 0); |
| glEnableVertexAttribArray(positionLoc); |
| glEnableVertexAttribArray(instancePosLoc); |
| |
| const GLint positionBinding = instancePosLoc; |
| const GLint instanceBinding = positionLoc; |
| |
| // Load the vertex position into the binding indexed positionBinding (== instancePosLoc) |
| // Load the instance position into the binding indexed instanceBinding (== positionLoc) |
| glBindVertexBuffer(positionBinding, quadBuffer, 0, 2 * sizeof(kQuadVertices[0])); |
| glBindVertexBuffer(instanceBinding, mInstanceBuffer, 0, sizeof(mInstanceData[0])); |
| |
| // The attribute indexed positionLoc is using the binding indexed positionBinding |
| // The attribute indexed instancePosLoc is using the binding indexed instanceBinding |
| glVertexAttribBinding(positionLoc, positionBinding); |
| glVertexAttribBinding(instancePosLoc, instanceBinding); |
| |
| // Enable instancing on the binding indexed instanceBinding |
| glVertexBindingDivisor(instanceBinding, divisor); |
| |
| // Do the first instanced draw |
| glClear(GL_COLOR_BUFFER_BIT); |
| glDrawElementsInstanced(GL_TRIANGLES, ArraySize(kQuadIndices), GL_UNSIGNED_SHORT, kQuadIndices, |
| numInstance); |
| checkDrawing(lastDrawn); |
| |
| // Disable instancing. |
| glVertexBindingDivisor(instanceBinding, 0); |
| |
| // Load the vertex position into the binding indexed positionLoc. |
| // Load the instance position into the binding indexed instancePosLoc. |
| glBindVertexBuffer(positionLoc, quadBuffer, 0, 2 * sizeof(kQuadVertices[0])); |
| glBindVertexBuffer(instancePosLoc, mInstanceBuffer, 0, sizeof(mInstanceData[0])); |
| |
| // The attribute indexed positionLoc is using the binding indexed positionLoc. |
| glVertexAttribBinding(positionLoc, positionLoc); |
| |
| // Call VertexAttribDivisor to both enable instancing on instancePosLoc and set the attribute |
| // indexed instancePosLoc using the binding indexed instancePosLoc. |
| glVertexAttribDivisor(instancePosLoc, divisor); |
| |
| // Do the second instanced draw |
| glClear(GL_COLOR_BUFFER_BIT); |
| glDrawElementsInstanced(GL_TRIANGLES, ArraySize(kQuadIndices), GL_UNSIGNED_SHORT, kQuadIndices, |
| numInstance); |
| checkDrawing(lastDrawn); |
| |
| glDeleteVertexArrays(1, &vao); |
| } |
| |
| // Verify that a large divisor that also changes doesn't cause issues and renders correctly. |
| TEST_P(InstancingTestES3, LargeDivisor) |
| { |
| // http://anglebug.com/4092 |
| ANGLE_SKIP_TEST_IF(isSwiftshader()); |
| constexpr char kVS[] = R"(#version 300 es |
| layout(location = 0) in vec4 a_position; |
| layout(location = 1) in vec4 a_color; |
| out vec4 v_color; |
| void main() |
| { |
| gl_Position = a_position; |
| gl_PointSize = 4.0f; |
| v_color = a_color; |
| })"; |
| |
| constexpr char kFS[] = R"(#version 300 es |
| precision highp float; |
| in vec4 v_color; |
| out vec4 my_FragColor; |
| void main() |
| { |
| my_FragColor = v_color; |
| })"; |
| |
| ANGLE_GL_PROGRAM(program, kVS, kFS); |
| glUseProgram(program); |
| |
| glClearColor(0.0f, 0.0f, 1.0f, 1.0f); |
| |
| GLBuffer buf; |
| glBindBuffer(GL_ARRAY_BUFFER, buf); |
| std::vector<GLfloat> vertices; |
| for (size_t i = 0u; i < 4u; ++i) |
| { |
| vertices.push_back(0.0f + i * 0.25f); |
| vertices.push_back(0.0f); |
| vertices.push_back(0.0f); |
| vertices.push_back(1.0f); |
| } |
| glBufferData(GL_ARRAY_BUFFER, vertices.size() * 4u, vertices.data(), GL_DYNAMIC_DRAW); |
| |
| glEnableVertexAttribArray(0); |
| glVertexAttribPointer(0, 4, GL_FLOAT, false, 0, nullptr); |
| ASSERT_GL_NO_ERROR(); |
| |
| GLBuffer colorBuf; |
| glBindBuffer(GL_ARRAY_BUFFER, colorBuf); |
| |
| std::array<GLColor, 4> ubyteColors = {GLColor::red, GLColor::green}; |
| std::vector<float> floatColors; |
| for (const GLColor &color : ubyteColors) |
| { |
| floatColors.push_back(color.R / 255.0f); |
| floatColors.push_back(color.G / 255.0f); |
| floatColors.push_back(color.B / 255.0f); |
| floatColors.push_back(color.A / 255.0f); |
| } |
| glBufferData(GL_ARRAY_BUFFER, floatColors.size() * 4u, floatColors.data(), GL_DYNAMIC_DRAW); |
| |
| const GLuint kColorDivisor = 65536u * 2u; |
| glEnableVertexAttribArray(1); |
| glVertexAttribPointer(1, 4, GL_FLOAT, false, 0, nullptr); |
| glVertexAttribDivisor(1, kColorDivisor); |
| |
| std::array<GLuint, 1u> indices = {0u}; |
| std::array<GLuint, 3u> divisorsToTry = {256u, 65536u, 65536u * 2u}; |
| |
| for (GLuint divisorToTry : divisorsToTry) |
| { |
| glClear(GL_COLOR_BUFFER_BIT); |
| glVertexAttribDivisor(0, divisorToTry); |
| |
| GLuint instanceCount = divisorToTry + 1u; |
| unsigned int pointsRendered = (instanceCount - 1u) / divisorToTry + 1u; |
| |
| glDrawElementsInstanced(GL_POINTS, indices.size(), GL_UNSIGNED_INT, indices.data(), |
| instanceCount); |
| ASSERT_GL_NO_ERROR(); |
| |
| // Check that the intended number of points has been rendered. |
| for (unsigned int pointIndex = 0u; pointIndex < pointsRendered + 1u; ++pointIndex) |
| { |
| GLint pointx = static_cast<GLint>((pointIndex * 0.125f + 0.5f) * getWindowWidth()); |
| GLint pointy = static_cast<GLint>(0.5f * getWindowHeight()); |
| |
| if (pointIndex < pointsRendered) |
| { |
| GLuint pointColorIndex = (pointIndex * divisorToTry) / kColorDivisor; |
| EXPECT_PIXEL_COLOR_EQ(pointx, pointy, ubyteColors[pointColorIndex]); |
| } |
| else |
| { |
| // Clear color. |
| EXPECT_PIXEL_COLOR_EQ(pointx, pointy, GLColor::blue); |
| } |
| } |
| } |
| } |
| |
| // This is a regression test. If VertexAttribDivisor was returned as a signed integer, it would be |
| // incorrectly clamped down to the maximum signed integer. |
| TEST_P(InstancingTestES3, LargestDivisor) |
| { |
| // http://anglebug.com/4092 |
| ANGLE_SKIP_TEST_IF(isSwiftshader()); |
| constexpr GLuint kLargeDivisor = std::numeric_limits<GLuint>::max(); |
| glVertexAttribDivisor(0, kLargeDivisor); |
| |
| GLuint divisor = 0; |
| glGetVertexAttribIuiv(0, GL_VERTEX_ATTRIB_ARRAY_DIVISOR, &divisor); |
| EXPECT_EQ(kLargeDivisor, divisor) |
| << "Vertex attrib divisor read was not the same that was passed in."; |
| } |
| |
| ANGLE_INSTANTIATE_TEST_ES3(InstancingTestES3); |
| |
| ANGLE_INSTANTIATE_TEST_ES31(InstancingTestES31); |
| |
| ANGLE_INSTANTIATE_TEST_ES2(InstancingTest); |
