GLContext.cc

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#include "GLContext.hh"
#include "GLDefaultScaler.hh"
#include "gl_transform.hh"
#include "narrow.hh"
#include <memory>
 
namespace gl {
 
// Global variables
std::optional<Context> context;
 
Context::Context(int width, int height)
{
        VertexShader   texVertexShader  ("texture.vert");
        FragmentShader texFragmentShader("texture.frag");
        progTex.allocate();
        progTex.attach(texVertexShader);
        progTex.attach(texFragmentShader);
        progTex.bindAttribLocation(0, "a_position");
        progTex.bindAttribLocation(1, "a_texCoord");
        progTex.link();
        progTex.activate();
        glUniform1i(progTex.getUniformLocation("u_tex"), 0);
        unifTexColor = progTex.getUniformLocation("u_color");
        unifTexMvp   = progTex.getUniformLocation("u_mvpMatrix");
 
        VertexShader   fillVertexShader  ("fill.vert");
        FragmentShader fillFragmentShader("fill.frag");
        progFill.allocate();
        progFill.attach(fillVertexShader);
        progFill.attach(fillFragmentShader);
        progFill.bindAttribLocation(0, "a_position");
        progFill.bindAttribLocation(1, "a_color");
        progFill.link();
        progFill.activate();
        unifFillMvp = progFill.getUniformLocation("u_mvpMatrix");
 
        pixelMvp = ortho(0.0f, narrow_cast<float>(width),
                         narrow_cast<float>(height), 0.0f,
                         -1.0f, 1.0f);
}
 
Context::~Context() = default;
 
openmsx::GLScaler& Context::getFallbackScaler()
{
        if (!fallbackScaler) {
                fallbackScaler = std::make_unique<openmsx::GLDefaultScaler>();
        }
        return *fallbackScaler;
}
 
} // namespace gl