// Test mapping with the OES extension.
TEST_P(BufferDataTest, MapBufferOES)
{
if (!IsGLExtensionEnabled("GL_EXT_map_buffer_range"))
{
// Needed for test validation.
return;
}
std::vector<uint8_t> data(1024);
FillVectorWithRandomUBytes(&data);
GLBuffer buffer;
glBindBuffer(GL_ARRAY_BUFFER, buffer.get());
glBufferData(GL_ARRAY_BUFFER, data.size(), nullptr, GL_STATIC_DRAW);
// Validate that other map flags don't work.
void *badMapPtr = glMapBufferOES(GL_ARRAY_BUFFER, GL_MAP_READ_BIT);
EXPECT_EQ(nullptr, badMapPtr);
EXPECT_GL_ERROR(GL_INVALID_ENUM);
// Map and write.
void *mapPtr = glMapBufferOES(GL_ARRAY_BUFFER, GL_WRITE_ONLY_OES);
ASSERT_NE(nullptr, mapPtr);
ASSERT_GL_NO_ERROR();
memcpy(mapPtr, data.data(), data.size());
glUnmapBufferOES(GL_ARRAY_BUFFER);
// Validate data with EXT_map_buffer_range
void *readMapPtr = glMapBufferRangeEXT(GL_ARRAY_BUFFER, 0, data.size(), GL_MAP_READ_BIT_EXT);
ASSERT_NE(nullptr, readMapPtr);
ASSERT_GL_NO_ERROR();
std::vector<uint8_t> actualData(data.size());
memcpy(actualData.data(), readMapPtr, data.size());
glUnmapBufferOES(GL_ARRAY_BUFFER);
EXPECT_EQ(data, actualData);
}
// Checks gl_PointCoord and gl_PointSize
// https://www.khronos.org/registry/webgl/sdk/tests/conformance/glsl/variables/gl-pointcoord.html
TEST_P(PointSpritesTest, PointCoordAndPointSizeCompliance)
{
// TODO(jmadill): figure out why this fails
if (IsIntel() && GetParam() == ES2_D3D9())
{
std::cout << "Test skipped on Intel due to failures." << std::endl;
return;
}
// TODO(jmadill): Investigate potential AMD driver bug.
// http://anglebug.com/1643
if (IsAMD() && IsDesktopOpenGL() && IsWindows())
{
std::cout << "Test skipped on desktop GL AMD Windows." << std::endl;
return;
}
const std::string fs =
R"(precision mediump float;
void main()
{
gl_FragColor = vec4(gl_PointCoord.x, gl_PointCoord.y, 0, 1);
})";
const std::string vs =
R"(attribute vec4 vPosition;
uniform float uPointSize;
void main()
{
gl_PointSize = uPointSize;
gl_Position = vPosition;
})";
ANGLE_GL_PROGRAM(program, vs, fs);
glUseProgram(program);
GLfloat pointSizeRange[2] = {};
glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, pointSizeRange);
GLfloat maxPointSize = pointSizeRange[1];
ASSERT_TRUE(maxPointSize >= 1);
maxPointSize = floorf(maxPointSize);
ASSERT_TRUE((int)maxPointSize % 1 == 0);
maxPointSize = std::min(maxPointSize, 64.0f);
GLfloat pointWidth = maxPointSize / windowWidth;
GLint step = static_cast<GLint>(floorf(maxPointSize / 4));
GLint pointStep = std::max<GLint>(1, step);
GLint pointSizeLoc = glGetUniformLocation(program, "uPointSize");
ASSERT_GL_NO_ERROR();
glUniform1f(pointSizeLoc, maxPointSize);
ASSERT_GL_NO_ERROR();
GLfloat pixelOffset = ((int)maxPointSize % 2) ? (1.0f / (GLfloat)windowWidth) : 0;
GLBuffer vertexObject;
glBindBuffer(GL_ARRAY_BUFFER, vertexObject.get());
ASSERT_GL_NO_ERROR();
GLfloat thePoints[] = {-0.5f + pixelOffset, -0.5f + pixelOffset, 0.5f + pixelOffset,
-0.5f + pixelOffset, -0.5f + pixelOffset, 0.5f + pixelOffset,
0.5f + pixelOffset, 0.5f + pixelOffset};
glBufferData(GL_ARRAY_BUFFER, sizeof(thePoints), thePoints, GL_STATIC_DRAW);
ASSERT_GL_NO_ERROR();
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDrawArrays(GL_POINTS, 0, 4);
ASSERT_GL_NO_ERROR();
std::string debugText;
for (float py = 0; py < 2; ++py)
{
for (float px = 0; px < 2; ++px)
{
float pointX = -0.5f + px + pixelOffset;
float pointY = -0.5f + py + pixelOffset;
for (int yy = 0; yy < maxPointSize; yy += pointStep)
{
for (int xx = 0; xx < maxPointSize; xx += pointStep)
{
// formula for s and t from OpenGL ES 2.0 spec section 3.3
float xw = s2p(pointX);
float yw = s2p(pointY);
float u = xx / maxPointSize * 2 - 1;
float v = yy / maxPointSize * 2 - 1;
int xf = static_cast<int>(floorf(s2p(pointX + u * pointWidth)));
int yf = static_cast<int>(floorf(s2p(pointY + v * pointWidth)));
float s = 0.5f + (xf + 0.5f - xw) / maxPointSize;
float t = 0.5f + (yf + 0.5f - yw) / maxPointSize;
GLubyte color[4] = {static_cast<GLubyte>(floorf(s * 255)),
static_cast<GLubyte>(floorf((1 - t) * 255)), 0, 255};
EXPECT_PIXEL_NEAR(xf, yf, color[0], color[1], color[2], color[3], 4);
}
}
}
}
}
glClearColor(0, 0, 0, 1);
glDisable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT);
GLint pointSizeLoc = glGetUniformLocation(program, "u_pointSize");
ASSERT_GL_NO_ERROR();
GLfloat pointSize = std::min<GLfloat>(20.0f, maxPointSize);
glUniform1f(pointSizeLoc, pointSize);
ASSERT_GL_NO_ERROR();
GLBuffer vertexObject;
ASSERT_GL_NO_ERROR();
glBindBuffer(GL_ARRAY_BUFFER, vertexObject.get());
ASSERT_GL_NO_ERROR();
GLfloat thePoints[] = {0.0f, 0.0f};
glBufferData(GL_ARRAY_BUFFER, sizeof(thePoints), thePoints, GL_STATIC_DRAW);
ASSERT_GL_NO_ERROR();
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
glDrawArrays(GL_POINTS, 0, 1);
ASSERT_GL_NO_ERROR();
// expect the center pixel to be green
EXPECT_PIXEL_EQ((windowWidth - 1) / 2, (windowHeight - 1) / 2, 0, 255, 0, 255);
