76 lines
2 KiB
C++
76 lines
2 KiB
C++
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#include <Spectre/Graphics/Texture.h>
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#include <Spectre/Graphics/OpenGL.h>
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#include <Spectre/Graphics/Renderable.h>
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#include <Spectre/Graphics/DefaultRenderer2D.h>
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namespace sp {
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DefaultRenderer2D::DefaultRenderer2D()
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{
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m_shader.create();
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if (!m_shader.loadFromFile("assets/shaders/standard.shader.glsl")) {
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std::cout << "Failed to load shader: " << m_shader.getLastError() << std::endl;
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}
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if (!m_shader.link()) {
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std::cout << "Failed to link shader: " << m_shader.getLastError() << std::endl;
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}
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}
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void DefaultRenderer2D::submit(const Renderable2D& renderable)
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{
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m_queue.push_back(&renderable);
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}
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void DefaultRenderer2D::render()
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{
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Matrix4f viewMatrix;
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if (m_camera) {
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viewMatrix = m_camera->getViewMatrix();
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} else {
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viewMatrix = Matrix4f::Identity;
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}
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m_shader.enable();
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glEnableVertexAttribArray(VertexAttribPosition);
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glEnableVertexAttribArray(VertexAttribColor0);
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glEnableVertexAttribArray(VertexAttribTexCoord0);
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for(size_t i = 0; i < m_queue.size(); i++) {
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const Renderable2D* obj = m_queue[i];
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const std::vector<Vertex2D> vertices = obj->getVertices();
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const std::vector<unsigned short> indices = obj->getIndices();
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unsigned char *data = (unsigned char*) &vertices[0];
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const Texture *tex = obj->getTexture();
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Matrix4f modelViewMatrix = viewMatrix * obj->getTransform().getMatrix();
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m_shader.setMVPMatrix(modelViewMatrix);
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glVertexAttribPointer(VertexAttribPosition, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), data + 0);
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glVertexAttribPointer(VertexAttribColor0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), data + 8);
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glVertexAttribPointer(VertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), data + 20);
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if (tex) {
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tex->enable();
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}
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glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_SHORT, &indices[0]);
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if (tex) {
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tex->disable();
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}
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}
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glDisableVertexAttribArray(VertexAttribPosition);
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glDisableVertexAttribArray(VertexAttribColor0);
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glDisableVertexAttribArray(VertexAttribTexCoord0);
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m_shader.disable();
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m_queue.clear();
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}
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} // namespace sp
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