void OsmAnd::AtlasMapRendererDebugStage_OpenGL::releaseQuads3D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glDeleteBuffers);
GL_CHECK_PRESENT(glDeleteProgram);
if(_iboQuad3D)
{
glDeleteBuffers(1, &_iboQuad3D);
GL_CHECK_RESULT;
_iboQuad3D.reset();
}
if(_vboQuad3D)
{
glDeleteBuffers(1, &_vboQuad3D);
GL_CHECK_RESULT;
_vboQuad3D.reset();
}
if(_vaoQuad3D)
{
gpuAPI->glDeleteVertexArrays_wrapper(1, &_vaoQuad3D);
GL_CHECK_RESULT;
_vaoQuad3D.reset();
}
if(_programQuad3D.id)
{
glDeleteProgram(_programQuad3D.id);
GL_CHECK_RESULT;
_programQuad3D = ProgramQuad3D();
}
}
bool OsmAnd::AtlasMapRendererDebugStage_OpenGL::releaseQuads3D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glDeleteBuffers);
GL_CHECK_PRESENT(glDeleteProgram);
if (_vaoQuad3D.isValid())
{
gpuAPI->releaseVAO(_vaoQuad3D);
_vaoQuad3D.reset();
}
if (_iboQuad3D.isValid())
{
glDeleteBuffers(1, &_iboQuad3D);
GL_CHECK_RESULT;
_iboQuad3D.reset();
}
if (_vboQuad3D.isValid())
{
glDeleteBuffers(1, &_vboQuad3D);
GL_CHECK_RESULT;
_vboQuad3D.reset();
}
if (_programQuad3D.id.isValid())
{
glDeleteProgram(_programQuad3D.id);
GL_CHECK_RESULT;
_programQuad3D = ProgramQuad3D();
}
return true;
}
void OsmAnd::AtlasMapRendererDebugStage_OpenGL::renderLines3D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glUseProgram);
GL_CHECK_PRESENT(glUniformMatrix4fv);
GL_CHECK_PRESENT(glUniform1f);
GL_CHECK_PRESENT(glUniform2f);
GL_CHECK_PRESENT(glUniform3f);
GL_CHECK_PRESENT(glDrawElements);
gpuAPI->glBindVertexArray_wrapper(_vaoLine3D);
GL_CHECK_RESULT;
// Activate program
glUseProgram(_programLine3D.id);
GL_CHECK_RESULT;
// Set projection*view*model matrix:
const auto& mProjectionView = internalState.mPerspectiveProjection * internalState.mCameraView;
glUniformMatrix4fv(_programLine3D.vs.param.mProjectionViewModel, 1, GL_FALSE, glm::value_ptr(mProjectionView));
GL_CHECK_RESULT;
for(const auto& primitive : constOf(_lines3D))
{
const auto& line = primitive.first;
const auto& color = primitive.second;
// Set line color
glUniform4f(_programLine3D.fs.param.color, SkColorGetR(color) / 255.0f, SkColorGetG(color) / 255.0f, SkColorGetB(color) / 255.0f, SkColorGetA(color) / 255.0f);
GL_CHECK_RESULT;
// Iterate over pairs of points
auto itV0 = line.cbegin();
auto itV1 = itV0 + 1;
for(const auto itEnd = line.cend(); itV1 != itEnd; itV0 = itV1, ++itV1)
{
const auto& v0 = *itV0;
const auto& v1 = *itV1;
// Set line coordinates
glUniform4f(_programLine3D.vs.param.v0, v0.x, v0.y, v0.z, 1.0f);
GL_CHECK_RESULT;
glUniform4f(_programLine3D.vs.param.v1, v1.x, v1.y, v1.z, 1.0f);
GL_CHECK_RESULT;
// Draw the line actually
glDrawElements(GL_LINES, 2, GL_UNSIGNED_SHORT, nullptr);
GL_CHECK_RESULT;
}
}
// Deactivate program
glUseProgram(0);
GL_CHECK_RESULT;
// Deselect VAO
gpuAPI->glBindVertexArray_wrapper(0);
GL_CHECK_RESULT;
}
void OsmAnd::AtlasMapRendererSkyStage_OpenGL::release()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glDeleteBuffers);
if(_skyplaneIBO)
{
glDeleteBuffers(1, &_skyplaneIBO);
GL_CHECK_RESULT;
_skyplaneIBO.reset();
}
if(_skyplaneVBO)
{
glDeleteBuffers(1, &_skyplaneVBO);
GL_CHECK_RESULT;
_skyplaneVBO.reset();
}
if(_skyplaneVAO)
{
gpuAPI->glDeleteVertexArrays_wrapper(1, &_skyplaneVAO);
GL_CHECK_RESULT;
_skyplaneVAO.reset();
}
if(_program.id)
{
glDeleteProgram(_program.id);
GL_CHECK_RESULT;
_program = Program();
}
}
bool OsmAnd::AtlasMapRendererDebugStage_OpenGL::renderLines2D()
{
const auto gpuAPI = getGPUAPI();
const auto& internalState = getInternalState();
GL_CHECK_PRESENT(glUseProgram);
GL_CHECK_PRESENT(glUniformMatrix4fv);
GL_CHECK_PRESENT(glUniform1f);
GL_CHECK_PRESENT(glUniform2f);
GL_CHECK_PRESENT(glUniform3f);
GL_CHECK_PRESENT(glDrawElements);
gpuAPI->useVAO(_vaoLine2D);
// Activate program
glUseProgram(_programLine2D.id);
GL_CHECK_RESULT;
// Set projection*view*model matrix:
glUniformMatrix4fv(_programLine2D.vs.param.mProjectionViewModel, 1, GL_FALSE, glm::value_ptr(internalState.mOrthographicProjection));
GL_CHECK_RESULT;
for(const auto& primitive : constOf(_lines2D))
{
const auto& line = primitive.first;
const auto& color = primitive.second;
// Set line color
glUniform4f(_programLine2D.fs.param.color, SkColorGetR(color) / 255.0f, SkColorGetG(color) / 255.0f, SkColorGetB(color) / 255.0f, SkColorGetA(color) / 255.0f);
GL_CHECK_RESULT;
// Iterate over pairs of points
auto itV0 = line.cbegin();
auto itV1 = itV0 + 1;
for(const auto itEnd = line.cend(); itV1 != itEnd; itV0 = itV1, ++itV1)
{
const auto& v0 = *itV0;
const auto& v1 = *itV1;
// Set line coordinates
glUniform2f(_programLine2D.vs.param.v0, v0.x, currentState.windowSize.y - v0.y);
GL_CHECK_RESULT;
glUniform2f(_programLine2D.vs.param.v1, v1.x, currentState.windowSize.y - v1.y);
GL_CHECK_RESULT;
// Draw the line actually
glDrawElements(GL_LINES, 2, GL_UNSIGNED_SHORT, nullptr);
GL_CHECK_RESULT;
}
}
// Deactivate program
glUseProgram(0);
GL_CHECK_RESULT;
gpuAPI->unuseVAO();
return true;
}
void OsmAnd::AtlasMapRendererDebugStage_OpenGL::renderQuads3D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glUseProgram);
GL_CHECK_PRESENT(glUniformMatrix4fv);
GL_CHECK_PRESENT(glUniform1f);
GL_CHECK_PRESENT(glUniform2f);
GL_CHECK_PRESENT(glUniform3f);
GL_CHECK_PRESENT(glDrawElements);
gpuAPI->glBindVertexArray_wrapper(_vaoQuad3D);
GL_CHECK_RESULT;
// Activate program
glUseProgram(_programQuad3D.id);
GL_CHECK_RESULT;
// Set projection*view*model matrix:
const auto& mProjectionView = internalState.mPerspectiveProjection * internalState.mCameraView;
glUniformMatrix4fv(_programQuad3D.vs.param.mProjectionViewModel, 1, GL_FALSE, glm::value_ptr(mProjectionView));
GL_CHECK_RESULT;
for(const auto& primitive : constOf(_quads3D))
{
const auto& p0 = std::get<0>(primitive);
const auto& p1 = std::get<1>(primitive);
const auto& p2 = std::get<2>(primitive);
const auto& p3 = std::get<3>(primitive);
const auto& color = std::get<4>(primitive);
// Set quad color
glUniform4f(_programQuad3D.fs.param.color, SkColorGetR(color) / 255.0f, SkColorGetG(color) / 255.0f, SkColorGetB(color) / 255.0f, SkColorGetA(color) / 255.0f);
GL_CHECK_RESULT;
// Set points
glUniform4f(_programQuad3D.vs.param.v0, p0.x, p0.y, p0.z, 1.0f);
GL_CHECK_RESULT;
glUniform4f(_programQuad3D.vs.param.v1, p1.x, p1.y, p1.z, 1.0f);
GL_CHECK_RESULT;
glUniform4f(_programQuad3D.vs.param.v2, p2.x, p2.y, p2.z, 1.0f);
GL_CHECK_RESULT;
glUniform4f(_programQuad3D.vs.param.v3, p3.x, p3.y, p3.z, 1.0f);
GL_CHECK_RESULT;
// Draw the quad actually
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, nullptr);
GL_CHECK_RESULT;
}
// Deactivate program
glUseProgram(0);
GL_CHECK_RESULT;
// Deselect VAO
gpuAPI->glBindVertexArray_wrapper(0);
GL_CHECK_RESULT;
}
void OsmAnd::AtlasMapRendererDebugStage_OpenGL::renderRects2D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glUseProgram);
GL_CHECK_PRESENT(glUniformMatrix4fv);
GL_CHECK_PRESENT(glUniform1f);
GL_CHECK_PRESENT(glUniform2f);
GL_CHECK_PRESENT(glUniform3f);
GL_CHECK_PRESENT(glDrawElements);
gpuAPI->glBindVertexArray_wrapper(_vaoRect2D);
GL_CHECK_RESULT;
// Activate program
glUseProgram(_programRect2D.id);
GL_CHECK_RESULT;
// Set projection*view*model matrix:
glUniformMatrix4fv(_programRect2D.vs.param.mProjectionViewModel, 1, GL_FALSE, glm::value_ptr(internalState.mOrthographicProjection));
GL_CHECK_RESULT;
for(const auto& primitive : constOf(_rects2D))
{
const auto& rect = std::get<0>(primitive);
const auto& color = std::get<1>(primitive);
const auto& angle = std::get<2>(primitive);
// Set rectangle coordinates
const auto center = rect.center();
glUniform4f(_programRect2D.vs.param.rect, currentState.windowSize.y - center.y, center.x, rect.height(), rect.width());
GL_CHECK_RESULT;
// Set rotation angle
glUniform1f(_programRect2D.vs.param.angle, angle);
GL_CHECK_RESULT;
// Set rectangle color
glUniform4f(_programRect2D.fs.param.color, SkColorGetR(color) / 255.0f, SkColorGetG(color) / 255.0f, SkColorGetB(color) / 255.0f, SkColorGetA(color) / 255.0f);
GL_CHECK_RESULT;
// Draw the rectangle actually
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, nullptr);
GL_CHECK_RESULT;
}
// Deactivate program
glUseProgram(0);
GL_CHECK_RESULT;
// Deselect VAO
gpuAPI->glBindVertexArray_wrapper(0);
GL_CHECK_RESULT;
}
void OsmAnd::AtlasMapRendererSkyStage_OpenGL::render()
{
const auto gpuAPI = getGPUAPI();
GL_PUSH_GROUP_MARKER(QLatin1String("sky"));
GL_CHECK_PRESENT(glUseProgram);
GL_CHECK_PRESENT(glUniformMatrix4fv);
GL_CHECK_PRESENT(glUniform1f);
GL_CHECK_PRESENT(glUniform2f);
GL_CHECK_PRESENT(glUniform3f);
GL_CHECK_PRESENT(glDrawElements);
// Set sky plane VAO
gpuAPI->glBindVertexArray_wrapper(_skyplaneVAO);
GL_CHECK_RESULT;
// Activate program
glUseProgram(_program.id);
GL_CHECK_RESULT;
// Set projection*view*model matrix:
const auto mFogTranslate = glm::translate(glm::vec3(0.0f, 0.0f, -internalState.correctedFogDistance));
const auto mModel = internalState.mAzimuthInv * mFogTranslate;
const auto mProjectionViewModel = internalState.mPerspectiveProjection * internalState.mCameraView * mModel;
glUniformMatrix4fv(_program.vs.param.mProjectionViewModel, 1, GL_FALSE, glm::value_ptr(mProjectionViewModel));
GL_CHECK_RESULT;
// Set size of the skyplane
glUniform2f(_program.vs.param.planeSize, internalState.skyplaneSize.x, internalState.skyplaneSize.y);
GL_CHECK_RESULT;
// Set sky parameters
glUniform4f(_program.fs.param.skyColor, currentState.skyColor.r, currentState.skyColor.g, currentState.skyColor.b, 1.0f);
GL_CHECK_RESULT;
// Draw the skyplane actually
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, nullptr);
GL_CHECK_RESULT;
// Deactivate program
glUseProgram(0);
GL_CHECK_RESULT;
// Deselect VAO
gpuAPI->glBindVertexArray_wrapper(0);
GL_CHECK_RESULT;
GL_POP_GROUP_MARKER;
}
bool OsmAnd::AtlasMapRendererDebugStage_OpenGL::releaseLines3D(const bool gpuContextLost)
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glDeleteBuffers);
GL_CHECK_PRESENT(glDeleteProgram);
if (_vaoLine3D.isValid())
{
gpuAPI->releaseVAO(_vaoLine3D, gpuContextLost);
_vaoLine3D.reset();
}
if (_iboLine3D.isValid())
{
if (!gpuContextLost)
{
glDeleteBuffers(1, &_iboLine3D);
GL_CHECK_RESULT;
}
_iboLine3D.reset();
}
if (_vboLine3D.isValid())
{
if (!gpuContextLost)
{
glDeleteBuffers(1, &_vboLine3D);
GL_CHECK_RESULT;
}
_vboLine3D.reset();
}
if (_programLine3D.id.isValid())
{
if (!gpuContextLost)
{
glDeleteProgram(_programLine3D.id);
GL_CHECK_RESULT;
}
_programLine3D = ProgramLine3D();
}
return true;
}
void OsmAnd::AtlasMapRendererDebugStage_OpenGL::initializeQuads3D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glGenBuffers);
GL_CHECK_PRESENT(glBindBuffer);
GL_CHECK_PRESENT(glBufferData);
GL_CHECK_PRESENT(glEnableVertexAttribArray);
GL_CHECK_PRESENT(glVertexAttribPointer);
// Compile vertex shader
const QString vertexShader = QLatin1String(
// Input data
// (1.0, 0.0, 0.0, 0.0) for first point
// (0.0, 1.0, 0.0, 0.0) for second point
// (0.0, 0.0, 1.0, 0.0) for third point
// (0.0, 0.0, 0.0, 1.0) for fourth point
"INPUT vec4 in_vs_vertexPosition; ""\n"
" ""\n"
// Parameters: common data
"uniform mat4 param_vs_mProjectionViewModel; ""\n"
"uniform vec4 param_vs_v0; ""\n"
"uniform vec4 param_vs_v1; ""\n"
"uniform vec4 param_vs_v2; ""\n"
"uniform vec4 param_vs_v3; ""\n"
" ""\n"
"void main() ""\n"
"{ ""\n"
" vec4 v = ""\n"
" in_vs_vertexPosition.x*param_vs_v0 + ""\n"
" in_vs_vertexPosition.y*param_vs_v1 + ""\n"
" in_vs_vertexPosition.z*param_vs_v2 + ""\n"
" in_vs_vertexPosition.w*param_vs_v3; ""\n"
" ""\n"
" gl_Position = param_vs_mProjectionViewModel * v; ""\n"
"} ""\n");
auto preprocessedVertexShader = vertexShader;
gpuAPI->preprocessVertexShader(preprocessedVertexShader);
gpuAPI->optimizeVertexShader(preprocessedVertexShader);
const auto vsId = gpuAPI->compileShader(GL_VERTEX_SHADER, qPrintable(preprocessedVertexShader));
assert(vsId != 0);
// Compile fragment shader
const QString fragmentShader = QLatin1String(
// Parameters: common data
"uniform lowp vec4 param_fs_color; ""\n"
" ""\n"
"void main() ""\n"
"{ ""\n"
" FRAGMENT_COLOR_OUTPUT = param_fs_color; ""\n"
"} ""\n");
auto preprocessedFragmentShader = fragmentShader;
QString preprocessedFragmentShader_UnrolledPerLayerProcessingCode;
gpuAPI->preprocessFragmentShader(preprocessedFragmentShader);
gpuAPI->optimizeFragmentShader(preprocessedFragmentShader);
const auto fsId = gpuAPI->compileShader(GL_FRAGMENT_SHADER, qPrintable(preprocessedFragmentShader));
assert(fsId != 0);
// Link everything into program object
GLuint shaders[] = { vsId, fsId };
_programQuad3D.id = gpuAPI->linkProgram(2, shaders);
assert(_programQuad3D.id);
const auto& lookup = gpuAPI->obtainVariablesLookupContext(_programQuad3D.id);
lookup->lookupLocation(_programQuad3D.vs.in.vertexPosition, "in_vs_vertexPosition", GLShaderVariableType::In);
lookup->lookupLocation(_programQuad3D.vs.param.mProjectionViewModel, "param_vs_mProjectionViewModel", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programQuad3D.vs.param.v0, "param_vs_v0", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programQuad3D.vs.param.v1, "param_vs_v1", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programQuad3D.vs.param.v2, "param_vs_v2", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programQuad3D.vs.param.v3, "param_vs_v3", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programQuad3D.fs.param.color, "param_fs_color", GLShaderVariableType::Uniform);
// Vertex data (x,y,z,w)
float vertices[4][4] =
{
{ 1.0f, 0.0f, 0.0f, 0.0f },
{ 0.0f, 1.0f, 0.0f, 0.0f },
{ 0.0f, 0.0f, 1.0f, 0.0f },
{ 0.0f, 0.0f, 0.0f, 1.0f }
};
const auto verticesCount = 4;
// Index data
GLushort indices[6] =
{
0, 1, 2,
0, 2, 3
};
const auto indicesCount = 6;
// Create Vertex Array Object
gpuAPI->glGenVertexArrays_wrapper(1, &_vaoQuad3D);
GL_CHECK_RESULT;
gpuAPI->glBindVertexArray_wrapper(_vaoQuad3D);
GL_CHECK_RESULT;
// Create vertex buffer and associate it with VAO
glGenBuffers(1, &_vboQuad3D);
GL_CHECK_RESULT;
glBindBuffer(GL_ARRAY_BUFFER, _vboQuad3D);
GL_CHECK_RESULT;
glBufferData(GL_ARRAY_BUFFER, verticesCount * sizeof(float)*4, vertices, GL_STATIC_DRAW);
GL_CHECK_RESULT;
glEnableVertexAttribArray(*_programQuad3D.vs.in.vertexPosition);
GL_CHECK_RESULT;
glVertexAttribPointer(*_programQuad3D.vs.in.vertexPosition, 4, GL_FLOAT, GL_FALSE, sizeof(float)*4, nullptr);
GL_CHECK_RESULT;
// Create index buffer and associate it with VAO
glGenBuffers(1, &_iboQuad3D);
GL_CHECK_RESULT;
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _iboQuad3D);
GL_CHECK_RESULT;
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indicesCount * sizeof(GLushort), indices, GL_STATIC_DRAW);
GL_CHECK_RESULT;
gpuAPI->glBindVertexArray_wrapper(0);
GL_CHECK_RESULT;
}
void OsmAnd::AtlasMapRendererDebugStage_OpenGL::initializeRects2D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glGenBuffers);
GL_CHECK_PRESENT(glBindBuffer);
GL_CHECK_PRESENT(glBufferData);
GL_CHECK_PRESENT(glEnableVertexAttribArray);
GL_CHECK_PRESENT(glVertexAttribPointer);
// Compile vertex shader
const QString vertexShader = QLatin1String(
// Input data
"INPUT vec2 in_vs_vertexPosition; ""\n"
" ""\n"
// Parameters: common data
"uniform mat4 param_vs_mProjectionViewModel; ""\n"
"uniform vec4 param_vs_rect; ""\n"
"uniform float param_vs_angle; ""\n"
" ""\n"
"void main() ""\n"
"{ ""\n"
" vec2 rectCenter = param_vs_rect.yx; ""\n"
" vec2 p = in_vs_vertexPosition*param_vs_rect.wz + rectCenter; ""\n"
" vec4 v; ""\n"
" float cos_a = cos(param_vs_angle); ""\n"
" float sin_a = sin(param_vs_angle); ""\n"
" p -= rectCenter; ""\n"
" v.x = rectCenter.x + p.x*cos_a - p.y*sin_a; ""\n"
" v.y = rectCenter.y + p.x*sin_a + p.y*cos_a; ""\n"
" v.z = -1.0; ""\n"
" v.w = 1.0; ""\n"
" ""\n"
" gl_Position = param_vs_mProjectionViewModel * v; ""\n"
"} ""\n");
auto preprocessedVertexShader = vertexShader;
gpuAPI->preprocessVertexShader(preprocessedVertexShader);
gpuAPI->optimizeVertexShader(preprocessedVertexShader);
const auto vsId = gpuAPI->compileShader(GL_VERTEX_SHADER, qPrintable(preprocessedVertexShader));
assert(vsId != 0);
// Compile fragment shader
const QString fragmentShader = QLatin1String(
// Parameters: common data
"uniform lowp vec4 param_fs_color; ""\n"
" ""\n"
"void main() ""\n"
"{ ""\n"
" FRAGMENT_COLOR_OUTPUT = param_fs_color; ""\n"
"} ""\n");
auto preprocessedFragmentShader = fragmentShader;
QString preprocessedFragmentShader_UnrolledPerLayerProcessingCode;
gpuAPI->preprocessFragmentShader(preprocessedFragmentShader);
gpuAPI->optimizeFragmentShader(preprocessedFragmentShader);
const auto fsId = gpuAPI->compileShader(GL_FRAGMENT_SHADER, qPrintable(preprocessedFragmentShader));
assert(fsId != 0);
// Link everything into program object
GLuint shaders[] = { vsId, fsId };
_programRect2D.id = gpuAPI->linkProgram(2, shaders);
assert(_programRect2D.id);
const auto& lookup = gpuAPI->obtainVariablesLookupContext(_programRect2D.id);
lookup->lookupLocation(_programRect2D.vs.in.vertexPosition, "in_vs_vertexPosition", GLShaderVariableType::In);
lookup->lookupLocation(_programRect2D.vs.param.mProjectionViewModel, "param_vs_mProjectionViewModel", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programRect2D.vs.param.rect, "param_vs_rect", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programRect2D.vs.param.angle, "param_vs_angle", GLShaderVariableType::Uniform);
lookup->lookupLocation(_programRect2D.fs.param.color, "param_fs_color", GLShaderVariableType::Uniform);
// Vertex data (x,y)
float vertices[4][2] =
{
{ -0.5f, -0.5f },
{ -0.5f, 0.5f },
{ 0.5f, 0.5f },
{ 0.5f, -0.5f }
};
const auto verticesCount = 4;
// Index data
GLushort indices[6] =
{
0, 1, 2,
0, 2, 3
};
const auto indicesCount = 6;
// Create Vertex Array Object
gpuAPI->glGenVertexArrays_wrapper(1, &_vaoRect2D);
GL_CHECK_RESULT;
gpuAPI->glBindVertexArray_wrapper(_vaoRect2D);
GL_CHECK_RESULT;
// Create vertex buffer and associate it with VAO
glGenBuffers(1, &_vboRect2D);
GL_CHECK_RESULT;
glBindBuffer(GL_ARRAY_BUFFER, _vboRect2D);
GL_CHECK_RESULT;
glBufferData(GL_ARRAY_BUFFER, verticesCount * sizeof(float)* 2, vertices, GL_STATIC_DRAW);
GL_CHECK_RESULT;
glEnableVertexAttribArray(*_programRect2D.vs.in.vertexPosition);
GL_CHECK_RESULT;
glVertexAttribPointer(*_programRect2D.vs.in.vertexPosition, 2, GL_FLOAT, GL_FALSE, sizeof(float)* 2, nullptr);
GL_CHECK_RESULT;
// Create index buffer and associate it with VAO
glGenBuffers(1, &_iboRect2D);
GL_CHECK_RESULT;
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _iboRect2D);
GL_CHECK_RESULT;
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indicesCount * sizeof(GLushort), indices, GL_STATIC_DRAW);
GL_CHECK_RESULT;
gpuAPI->glBindVertexArray_wrapper(0);
GL_CHECK_RESULT;
}
bool OsmAnd::AtlasMapRendererDebugStage_OpenGL::initializeLines3D()
{
const auto gpuAPI = getGPUAPI();
GL_CHECK_PRESENT(glGenBuffers);
GL_CHECK_PRESENT(glBindBuffer);
GL_CHECK_PRESENT(glBufferData);
GL_CHECK_PRESENT(glEnableVertexAttribArray);
GL_CHECK_PRESENT(glVertexAttribPointer);
GL_CHECK_PRESENT(glDeleteShader);
GL_CHECK_PRESENT(glDeleteProgram);
// Compile vertex shader
const QString vertexShader = QLatin1String(
// Input data
"INPUT vec2 in_vs_vertexPosition; // (1.0, 0.0) for first point, (0.0, 1.0) for second ""\n"
" ""\n"
// Parameters: common data
"uniform mat4 param_vs_mProjectionViewModel; ""\n"
"uniform vec4 param_vs_v0; ""\n"
"uniform vec4 param_vs_v1; ""\n"
" ""\n"
"void main() ""\n"
"{ ""\n"
" vec4 v; ""\n"
" v = in_vs_vertexPosition.x*param_vs_v0 + in_vs_vertexPosition.y*param_vs_v1; ""\n"
" ""\n"
" gl_Position = param_vs_mProjectionViewModel * v; ""\n"
"} ""\n");
auto preprocessedVertexShader = vertexShader;
gpuAPI->preprocessVertexShader(preprocessedVertexShader);
gpuAPI->optimizeVertexShader(preprocessedVertexShader);
const auto vsId = gpuAPI->compileShader(GL_VERTEX_SHADER, qPrintable(preprocessedVertexShader));
if (vsId == 0)
{
LogPrintf(LogSeverityLevel::Error,
"Failed to compile AtlasMapRendererDebugStage_OpenGL vertex shader");
return false;
}
// Compile fragment shader
const QString fragmentShader = QLatin1String(
// Parameters: common data
"uniform lowp vec4 param_fs_color; ""\n"
" ""\n"
"void main() ""\n"
"{ ""\n"
" FRAGMENT_COLOR_OUTPUT = param_fs_color; ""\n"
"} ""\n");
auto preprocessedFragmentShader = fragmentShader;
QString preprocessedFragmentShader_UnrolledPerLayerProcessingCode;
gpuAPI->preprocessFragmentShader(preprocessedFragmentShader);
gpuAPI->optimizeFragmentShader(preprocessedFragmentShader);
const auto fsId = gpuAPI->compileShader(GL_FRAGMENT_SHADER, qPrintable(preprocessedFragmentShader));
if (fsId == 0)
{
glDeleteShader(vsId);
GL_CHECK_RESULT;
LogPrintf(LogSeverityLevel::Error,
"Failed to compile AtlasMapRendererDebugStage_OpenGL fragment shader");
return false;
}
// Link everything into program object
GLuint shaders[] = { vsId, fsId };
QHash< QString, GPUAPI_OpenGL::GlslProgramVariable > variablesMap;
_programLine3D.id = gpuAPI->linkProgram(2, shaders, true, &variablesMap);
if (!_programLine3D.id.isValid())
{
LogPrintf(LogSeverityLevel::Error,
"Failed to link AtlasMapRendererDebugStage_OpenGL program");
return false;
}
bool ok = true;
const auto& lookup = gpuAPI->obtainVariablesLookupContext(_programLine3D.id, variablesMap);
ok = ok && lookup->lookupLocation(_programLine3D.vs.in.vertexPosition, "in_vs_vertexPosition", GlslVariableType::In);
ok = ok && lookup->lookupLocation(_programLine3D.vs.param.mProjectionViewModel, "param_vs_mProjectionViewModel", GlslVariableType::Uniform);
ok = ok && lookup->lookupLocation(_programLine3D.vs.param.v0, "param_vs_v0", GlslVariableType::Uniform);
ok = ok && lookup->lookupLocation(_programLine3D.vs.param.v1, "param_vs_v1", GlslVariableType::Uniform);
ok = ok && lookup->lookupLocation(_programLine3D.fs.param.color, "param_fs_color", GlslVariableType::Uniform);
if (!ok)
{
glDeleteProgram(_programLine3D.id);
GL_CHECK_RESULT;
_programLine3D.id.reset();
return false;
}
// Vertex data (x,y)
float vertices[2][2] =
{
{ 1.0f, 0.0f },
{ 0.0f, 1.0f }
};
const auto verticesCount = 2;
// Index data
GLushort indices[2] =
{
0, 1
};
const auto indicesCount = 2;
_vaoLine3D = gpuAPI->allocateUninitializedVAO();
// Create vertex buffer and associate it with VAO
glGenBuffers(1, &_vboLine3D);
GL_CHECK_RESULT;
glBindBuffer(GL_ARRAY_BUFFER, _vboLine3D);
GL_CHECK_RESULT;
glBufferData(GL_ARRAY_BUFFER, verticesCount * sizeof(float)* 2, vertices, GL_STATIC_DRAW);
GL_CHECK_RESULT;
glEnableVertexAttribArray(*_programLine3D.vs.in.vertexPosition);
GL_CHECK_RESULT;
glVertexAttribPointer(*_programLine3D.vs.in.vertexPosition, 2, GL_FLOAT, GL_FALSE, sizeof(float)* 2, nullptr);
GL_CHECK_RESULT;
// Create index buffer and associate it with VAO
glGenBuffers(1, &_iboLine3D);
GL_CHECK_RESULT;
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _iboLine3D);
GL_CHECK_RESULT;
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indicesCount * sizeof(GLushort), indices, GL_STATIC_DRAW);
GL_CHECK_RESULT;
gpuAPI->initializeVAO(_vaoLine3D);
glBindBuffer(GL_ARRAY_BUFFER, 0);
GL_CHECK_RESULT;
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
GL_CHECK_RESULT;
return true;
}
