// Set this renderer to use the specified FBO and
// set the viewport size to be the width and height of this FBO.
bool Renderer::SetupGraphics(FrameBuffer* buffer)
{
bool succeeded = false;
do {
if (mGlProgram == 0)
{
if (!InitializeGLProgram())
{
break;
}
}
glUseProgram(mGlProgram);
if (!checkGlError("glUseProgram")) break;
glBindFramebuffer(GL_FRAMEBUFFER, buffer->GetFrameBufferName());
mFrameBuffer = buffer;
mSurfaceWidth = mFrameBuffer->GetWidth();
mSurfaceHeight = mFrameBuffer->GetHeight();
glViewport(0, 0, mSurfaceWidth, mSurfaceHeight);
if (!checkGlError("glViewport")) break;
succeeded = true;
} while (false);
return succeeded;
}
// Set this renderer to use the default frame-buffer (screen) and
// set the viewport size to be the given width and height (pixels).
bool Renderer::SetupGraphics(int width, int height)
{
bool succeeded = false;
do {
if (mGlProgram == 0)
{
if (!InitializeGLProgram())
{
break;
}
}
glUseProgram(mGlProgram);
if (!checkGlError("glUseProgram")) break;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
mFrameBuffer = NULL;
mSurfaceWidth = width;
mSurfaceHeight = height;
glViewport(0, 0, mSurfaceWidth, mSurfaceHeight);
if (!checkGlError("glViewport")) break;
succeeded = true;
} while (false);
return succeeded;
}
bool InitializeGL() {
static const GLfloat vVertices[] = {
// front
-1.0f, -1.0f, +1.0f, // point blue
+1.0f, -1.0f, +1.0f, // point magenta
-1.0f, +1.0f, +1.0f, // point cyan
+1.0f, +1.0f, +1.0f, // point white
// back
+1.0f, -1.0f, -1.0f, // point red
-1.0f, -1.0f, -1.0f, // point black
+1.0f, +1.0f, -1.0f, // point yellow
-1.0f, +1.0f, -1.0f, // point green
// right
+1.0f, -1.0f, +1.0f, // point magenta
+1.0f, -1.0f, -1.0f, // point red
+1.0f, +1.0f, +1.0f, // point white
+1.0f, +1.0f, -1.0f, // point yellow
// left
-1.0f, -1.0f, -1.0f, // point black
-1.0f, -1.0f, +1.0f, // point blue
-1.0f, +1.0f, -1.0f, // point green
-1.0f, +1.0f, +1.0f, // point cyan
// top
-1.0f, +1.0f, +1.0f, // point cyan
+1.0f, +1.0f, +1.0f, // point white
-1.0f, +1.0f, -1.0f, // point green
+1.0f, +1.0f, -1.0f, // point yellow
// bottom
-1.0f, -1.0f, -1.0f, // point black
+1.0f, -1.0f, -1.0f, // point red
-1.0f, -1.0f, +1.0f, // point blue
+1.0f, -1.0f, +1.0f // point magenta
};
static const GLfloat vColors[] = {
// front
0.0f, 0.0f, 1.0f, // blue
1.0f, 0.0f, 1.0f, // magenta
0.0f, 1.0f, 1.0f, // cyan
1.0f, 1.0f, 1.0f, // white
// back
1.0f, 0.0f, 0.0f, // red
0.0f, 0.0f, 0.0f, // black
1.0f, 1.0f, 0.0f, // yellow
0.0f, 1.0f, 0.0f, // green
// right
1.0f, 0.0f, 1.0f, // magenta
1.0f, 0.0f, 0.0f, // red
1.0f, 1.0f, 1.0f, // white
1.0f, 1.0f, 0.0f, // yellow
// left
0.0f, 0.0f, 0.0f, // black
0.0f, 0.0f, 1.0f, // blue
0.0f, 1.0f, 0.0f, // green
0.0f, 1.0f, 1.0f, // cyan
// top
0.0f, 1.0f, 1.0f, // cyan
1.0f, 1.0f, 1.0f, // white
0.0f, 1.0f, 0.0f, // green
1.0f, 1.0f, 0.0f, // yellow
// bottom
0.0f, 0.0f, 0.0f, // black
1.0f, 0.0f, 0.0f, // red
0.0f, 0.0f, 1.0f, // blue
1.0f, 0.0f, 1.0f // magenta
};
static const GLfloat vNormals[] = {
// front
+0.0f, +0.0f, +1.0f, // forward
+0.0f, +0.0f, +1.0f, // forward
+0.0f, +0.0f, +1.0f, // forward
+0.0f, +0.0f, +1.0f, // forward
// back
+0.0f, +0.0f, -1.0f, // backbard
+0.0f, +0.0f, -1.0f, // backbard
+0.0f, +0.0f, -1.0f, // backbard
+0.0f, +0.0f, -1.0f, // backbard
// right
+1.0f, +0.0f, +0.0f, // right
+1.0f, +0.0f, +0.0f, // right
+1.0f, +0.0f, +0.0f, // right
+1.0f, +0.0f, +0.0f, // right
// left
-1.0f, +0.0f, +0.0f, // left
-1.0f, +0.0f, +0.0f, // left
-1.0f, +0.0f, +0.0f, // left
-1.0f, +0.0f, +0.0f, // left
// top
+0.0f, +1.0f, +0.0f, // up
+0.0f, +1.0f, +0.0f, // up
+0.0f, +1.0f, +0.0f, // up
+0.0f, +1.0f, +0.0f, // up
// bottom
+0.0f, -1.0f, +0.0f, // down
+0.0f, -1.0f, +0.0f, // down
+0.0f, -1.0f, +0.0f, // down
+0.0f, -1.0f, +0.0f // down
};
if (!InitializeGLProgram())
return false;
modelviewmatrix_ = glGetUniformLocation(program_, "modelviewMatrix");
modelviewprojectionmatrix_ =
glGetUniformLocation(program_, "modelviewprojectionMatrix");
normalmatrix_ = glGetUniformLocation(program_, "normalMatrix");
glViewport(0, 0, display_size_.width, display_size_.height);
glEnable(GL_CULL_FACE);
GLintptr positionsoffset = 0;
GLintptr colorsoffset = sizeof(vVertices);
GLintptr normalsoffset = sizeof(vVertices) + sizeof(vColors);
glGenBuffers(1, &vbo_);
glBindBuffer(GL_ARRAY_BUFFER, vbo_);
glBufferData(GL_ARRAY_BUFFER,
sizeof(vVertices) + sizeof(vColors) + sizeof(vNormals), 0,
GL_STATIC_DRAW);
glBufferSubData(GL_ARRAY_BUFFER, positionsoffset, sizeof(vVertices),
&vVertices[0]);
glBufferSubData(GL_ARRAY_BUFFER, colorsoffset, sizeof(vColors),
&vColors[0]);
glBufferSubData(GL_ARRAY_BUFFER, normalsoffset, sizeof(vNormals),
&vNormals[0]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0,
reinterpret_cast<const void*>(positionsoffset));
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0,
reinterpret_cast<const void*>(normalsoffset));
glEnableVertexAttribArray(1);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 0,
reinterpret_cast<const void*>(colorsoffset));
glEnableVertexAttribArray(2);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
return true;
}