CtsNativeHardwareTestCases: use compute shader to write SSBO
Shader storage buffer object (SSBO) support in vertex shader is optional
according to the OpenGL ES 3.1 specification. Modify the test to use
compute shader writes to SSBOs to test blob buffers.
Bug: 115557786
Test: Passes on Pixel XL.
Change-Id: I2b4be377a2c009ae38d23b03e750bb0d01c598b2
diff --git a/tests/tests/nativehardware/jni/AHardwareBufferGLTest.cpp b/tests/tests/nativehardware/jni/AHardwareBufferGLTest.cpp
index 36f1b8a..dbe18f2 100644
--- a/tests/tests/nativehardware/jni/AHardwareBufferGLTest.cpp
+++ b/tests/tests/nativehardware/jni/AHardwareBufferGLTest.cpp
@@ -502,29 +502,14 @@
}
)glsl";
-const char* kSsboVertexShaderEs31 = R"glsl(#version 310 es
- in vec2 aPosition;
- in float aDepth;
- uniform mediump float uScale;
+const char* kSsboComputeShaderEs31 = R"glsl(#version 310 es
+ layout(local_size_x = 1) in;
layout(std430, binding=0) buffer Output {
- vec2 data[];
+ uint data[];
} bOutput;
- out mediump vec2 vTexCoords;
void main() {
- bOutput.data[gl_VertexID] = aPosition;
- vTexCoords = (vec2(1.0) + aPosition) * 0.5;
- gl_Position.xy = aPosition * uScale;
- gl_Position.z = aDepth;
- gl_Position.w = 1.0;
- }
-)glsl";
-
-const char* kColorFragmentShaderEs3x = R"glsl(
- precision mediump float;
- uniform lowp vec4 uColor;
- out mediump vec4 color;
- void main() {
- color = uColor;
+ bOutput.data[gl_GlobalInvocationID.x] =
+ gl_GlobalInvocationID.x * 3u;
}
)glsl";
@@ -1232,8 +1217,9 @@
mGLVersion / 10, mGLVersion % 10);
return;
}
+ const int kBufferElements = 16;
AHardwareBuffer_Desc desc = GetParam();
- desc.width = sizeof kQuadPositions;
+ desc.width = kBufferElements * sizeof(int);
desc.usage = AHARDWAREBUFFER_USAGE_CPU_READ_RARELY | AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER;
if (!SetUpBuffer(desc)) return;
@@ -1244,30 +1230,44 @@
}
// Clear the buffer to zero
- std::vector<float> zero_data(desc.width / sizeof(float), 0.f);
- glBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, desc.width, zero_data.data());
+ std::vector<unsigned int> expected_data(kBufferElements, 0U);
+ glBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, desc.width, expected_data.data());
glFinish();
- // Write into the buffer with a shader
- SetUpFramebuffer(40, 40, 0, kRenderbuffer);
- SetUpProgram(kSsboVertexShaderEs31, std::string("#version 310 es") + kColorFragmentShaderEs3x,
- kQuadPositions, 0.5f);
+ // Write into the buffer with a compute shader
+ GLint status = 0;
+ mProgram = glCreateProgram();
+ GLuint shader = glCreateShader(GL_COMPUTE_SHADER);
+ glShaderSource(shader, 1, &kSsboComputeShaderEs31, nullptr);
+ glCompileShader(shader);
+ glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
+ ASSERT_EQ(GL_TRUE, status) << "Compute shader compilation failed";
+ glAttachShader(mProgram, shader);
+ glLinkProgram(mProgram);
+ glGetProgramiv(mProgram, GL_LINK_STATUS, &status);
+ ASSERT_EQ(GL_TRUE, status) << "Shader program linking failed";
+ glDetachShader(mProgram, shader);
+ glDeleteShader(shader);
+ glUseProgram(mProgram);
+ ASSERT_EQ(GLenum{GL_NO_ERROR}, glGetError());
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, mBufferObjects[mWhich]);
- glDrawArrays(GL_TRIANGLES, 0, kQuadVertexCount);
+ glDispatchCompute(kBufferElements, 1, 1);
+ glMemoryBarrier(GL_BUFFER_UPDATE_BARRIER_BIT);
glFinish();
EXPECT_EQ(GLenum{GL_NO_ERROR}, glGetError());
// Inspect the data written into the buffer using CPU access.
MakeCurrent(0);
- float* data = nullptr;
+ unsigned int* data = nullptr;
int result = AHardwareBuffer_lock(mBuffer, AHARDWAREBUFFER_USAGE_CPU_READ_RARELY,
-1, nullptr, reinterpret_cast<void**>(&data));
ASSERT_EQ(NO_ERROR, result);
std::ostringstream s;
- for (int i = 0; i < 12; ++i) {
+ for (int i = 0; i < kBufferElements; ++i) {
+ expected_data[i] = static_cast<unsigned int>(i * 3);
s << data[i] << ", ";
}
- EXPECT_EQ(0, memcmp(kQuadPositions, data, desc.width)) << s.str();
+ EXPECT_EQ(0, memcmp(expected_data.data(), data, desc.width)) << s.str();
AHardwareBuffer_unlock(mBuffer, nullptr);
}
