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BatchRenderer2D: OpenGL Core profile requires the use of VAO, so implement that.

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This commit is contained in:
Henrik Hautakoski 2018-02-28 00:07:03 +01:00
parent 4bc2b3fa56
commit 93f869acc6
2 changed files with 21 additions and 25 deletions
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45
source/Graphics/BatchRenderer2D.cpp
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@ -30,8 +30,23 @@ BatchRenderer2D::BatchRenderer2D()
glGenBuffers(1, &m_IBO);
glGenBuffers(1, &m_VBO);
// Generate and bind Vertex Array Object
glGenVertexArrays(1, &m_VAO);
glBindVertexArray(m_VAO);
setBatchSize(10000);
// Setup position.
glEnableVertexAttribArray(VertexAttribPosition);
glVertexAttribPointer(VertexAttribPosition, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*)0);
// Setup color
glEnableVertexAttribArray(VertexAttribColor0);
glVertexAttribPointer(VertexAttribColor0, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*)8);
glEnableVertexAttribArray(VertexAttribTexCoord0);
glVertexAttribPointer(VertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*)24);
m_textShader.create();
if (!m_textShader.loadFromFile("assets/shaders/text.shader.glsl")) {
std::cout << "Failed to load shader: " << m_textShader.getLastError() << std::endl;
@ -55,6 +70,7 @@ BatchRenderer2D::~BatchRenderer2D()
{
glDeleteBuffers(1, &m_VBO);
glDeleteBuffers(1, &m_IBO);
glDeleteVertexArrays(1, &m_VAO);
}
void BatchRenderer2D::setBatchSize(unsigned short size)
@ -82,12 +98,12 @@ void BatchRenderer2D::setBatchSize(unsigned short size)
// Upload to GPU
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_IBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned short), &indices[0], GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
// Allocate memory for vertex buffer.
glBindBuffer(GL_ARRAY_BUFFER, m_VBO);
glBufferData(GL_ARRAY_BUFFER, m_size * sizeof(Vertex2D), NULL, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
//glBindBuffer(GL_ARRAY_BUFFER, 0);
// Log
log("BatchRenderer - BatchSize\n");
@ -124,22 +140,9 @@ void BatchRenderer2D::render()
return;
}
// Bind buffers.
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_IBO);
glBindBuffer(GL_ARRAY_BUFFER, m_VBO);
// Bind VAO
glBindVertexArray(m_VAO);
// Setup position.
glEnableVertexAttribArray(VertexAttribPosition);
glVertexAttribPointer(VertexAttribPosition, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*) 0);
// Setup color
glEnableVertexAttribArray(VertexAttribColor0);
glVertexAttribPointer(VertexAttribColor0, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*) 8);
glEnableVertexAttribArray(VertexAttribTexCoord0);
glVertexAttribPointer(VertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*) 24);
// Set shader uniforms.
m_textShader.enable();
m_textShader.setUniform("u_MVP", MVP);
@ -151,14 +154,6 @@ void BatchRenderer2D::render()
prepareQueue();
glDisableVertexAttribArray(VertexAttribPosition);
glDisableVertexAttribArray(VertexAttribColor0);
glDisableVertexAttribArray(VertexAttribTexCoord0);
// Unbind all buffers.
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
m_queue.clear();
m_state.cleanup();
}