ProgramBuilder (OpenGLShaderProgram& prog)
{
prog.addShader ("attribute " JUCE_HIGHP " vec2 position;"
"uniform " JUCE_HIGHP " vec2 screenSize;"
"varying " JUCE_HIGHP " vec2 pixelPos;"
"void main()"
"{"
"pixelPos = position;"
JUCE_HIGHP " vec2 scaled = position / (0.5 * screenSize.xy);"
"gl_Position = vec4 (scaled.x - 1.0, 1.0 - scaled.y, 0, 1.0);"
"}",
GL_VERTEX_SHADER);
prog.addShader ("uniform sampler2D imageTexture;"
"uniform " JUCE_HIGHP " float textureBounds[4];"
"varying " JUCE_HIGHP " vec2 pixelPos;"
"void main()"
"{"
JUCE_HIGHP " vec2 texturePos = (pixelPos - vec2 (textureBounds[0], textureBounds[1]))"
"/ vec2 (textureBounds[2], textureBounds[3]);"
"gl_FragColor = texture2D (imageTexture, vec2 (texturePos.x, 1.0 - texturePos.y));"
"}",
GL_FRAGMENT_SHADER);
prog.link();
}
void Graphics3D::render(const Matrix &view, const Matrix &proj, const Light *lighting, int flags)
{
if (!getIsVisible()) return;
if (!isValid()) return;
if (lighting == nullptr) {
lighting = defaultLight;
}
Matrix modl = referenceFrame->getModelMatrix();
OpenGLShaderProgram *shaderProgram = shader->getShader();
shaderProgram->use();
OpenGLShaderProgram::Uniform modlMatrix(*shaderProgram, "M");
OpenGLShaderProgram::Uniform viewMatrix(*shaderProgram, "V");
OpenGLShaderProgram::Uniform projMatrix(*shaderProgram, "P");
OpenGLShaderProgram::Uniform selectionHandle(*shaderProgram, "selectionHandle");
modlMatrix.setMatrix4(modl.mat, 1, false);
viewMatrix.setMatrix4(view.mat, 1, false);
projMatrix.setMatrix4(proj.mat, 1, false);
selectionHandle.set(flags ? uniqueHandle : 0);
geometry->activate(shaderProgram);
material->activate(shaderProgram);
lighting->activate(shaderProgram);
geometry->drawElements();
geometry->deactivate(shaderProgram);
material->deactivate(shaderProgram);
lighting->deactivate(shaderProgram);
}
void OpenGLRenderer::setProgramBlockBinding(Renderer::ShaderProgram* p,
const std::string& name,
GLint point) {
OpenGLShaderProgram* glsh = static_cast<OpenGLShaderProgram*>(p);
auto ubi = glGetUniformBlockIndex(glsh->getName(), name.c_str());
glUniformBlockBinding(glsh->getName(), ubi, point);
}
void process_vertex_attribute(
OpenGLContext& openGLContext,
OpenGLShaderProgram& shader,
std::string name,
size_t stride_bytes,
size_t offset_bytes
)
{
// e.g. float[3] -> float and 3
using Type = typename remove_extent<Tn>::type;
static constexpr size_t dim = extent<Tn>::value;
GLint location = openGLContext.extensions.glGetAttribLocation(shader.getProgramID(), attributeName);
if( location == -1 )
return nullptr; // not found in shader
OpenGLShaderProgram::Attribute gl_attribute = new OpenGLShaderProgram::Attribute (shader, attributeName);
if( gl_attribute == nullptr )
return nullptr;
generic_glVertexAttribPointer<Type>(
attribNumber->attributeID,
dim,
vec_bytes,
(const GLvoid *)offset_bytes
);
glEnableVertexAttribArray( attribNumber->attributeID );
}
OpenGLShaderProgram::Attribute::Attribute (const OpenGLShaderProgram& program, const char* name)
: attributeID (program.context.extensions.glGetAttribLocation (program.getProgramID(), name))
{
jassert (attributeID >= 0);
}
OpenGLShaderProgram::Uniform::Uniform (const OpenGLShaderProgram& program, const char* const name)
: uniformID (program.context.extensions.glGetUniformLocation (program.getProgramID(), name)), context (program.context)
{
jassert (uniformID >= 0);
}
