TextureDescription RenderingEngine::SetPngTexture(const string& filename)
{
//return _resourceManager->LoadPngImage2(filename);
TextureDescription description = _resourceManager->LoadPngImage(filename);
GLuint name;
glGenTextures(1, &name);
description.Name = name;
glBindTexture(GL_TEXTURE_2D, name);
//_currentTextureID = name;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
GLenum format = 0;
switch (description.Format) {
case TextureFormatGray: format = GL_LUMINANCE; break;
case TextureFormatGrayAlpha: format = GL_LUMINANCE_ALPHA; break;
case TextureFormatRgb: format = GL_RGB; break;
case TextureFormatRgba: format = GL_RGBA; break;
default:
break;
}
GLenum type;
switch (description.BitsPerComponent) {
case 8: type = GL_UNSIGNED_BYTE; break;
case 4:
if (GL_RGBA == format) {
type = GL_UNSIGNED_SHORT_4_4_4_4;
break;
}
// intentionally fall through
default:
assert(!"Unsupported format.");
}
void* data = _resourceManager->GetImageData();
ivec2 size = description.Size;
glTexImage2D(GL_TEXTURE_2D, 0, format, size.x, size.y, 0, format, type, data);
_resourceManager->UnloadImage();
return description;
// TextureDescription description = _resourceManager->LoadPngImage2(filename);
//
// return description;
}
void RenderingEngine::UploadImage(const TextureDescription& description, void* data)
{
GLenum format;
switch (description.Format) {
case TextureFormatRgb: format = GL_RGB; break;
case TextureFormatRgba: format = GL_RGBA; break;
}
GLenum type = GL_UNSIGNED_BYTE;
ivec2 size = description.Size;
if (data == 0) {
data = m_resourceManager->GetImageData();
glTexImage2D(GL_TEXTURE_2D, 0, format, size.x, size.y, 0, format, type, data);
m_resourceManager->UnloadImage();
} else {
glTexImage2D(GL_TEXTURE_2D, 0, format, size.x, size.y, 0, format, type, data);
}
}
TextureDescription RenderingEngine::SetPvrTexture(const string& filename)
{
TextureDescription description = _resourceManager->LoadPvrImage(filename);
GLuint name;
glGenTextures(1, &name);
description.Name = name;
glBindTexture(GL_TEXTURE_2D, name);
//_currentTextureID = name;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
unsigned char* data = (unsigned char*) _resourceManager->GetImageData();
int width = description.Size.x;
int height = description.Size.y;
int bitsPerPixel = 0;
GLenum format;
bool compressed = true;
switch (description.Format) {
case TextureFormatPvrtcRgba2:
bitsPerPixel = 2;
format = GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
break;
case TextureFormatPvrtcRgb2:
bitsPerPixel = 2;
format = GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
break;
case TextureFormatPvrtcRgba4:
bitsPerPixel = 4;
format = GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
break;
case TextureFormatPvrtcRgb4:
bitsPerPixel = 4;
format = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
break;
default:
compressed = false;
break;
}
if (compressed) {
for (int level = 0; level < description.MipCount; ++level) {
GLsizei size = max(32, width * height * bitsPerPixel / 8);
glCompressedTexImage2D(GL_TEXTURE_2D, level, format, width, height, 0, size, data);
data += size;
width >>= 1; height >>= 1;
}
} /*else {
//cout << "Format:" << description.Format << endl;
GLenum type;
switch (description.Format) {
case TextureFormatRgba:
//cout << "GL_RGBA" << endl;
assert(description.BitsPerComponent == 4);
format = GL_RGBA;
type = GL_UNSIGNED_SHORT_4_4_4_4;
bitsPerPixel = 16;
break;
case TextureFormat565:
//cout << "GL_RGB" << endl;
format = GL_RGB;
type = GL_UNSIGNED_SHORT_5_6_5;
bitsPerPixel = 16;
break;
case TextureFormat5551:
//cout << "GL_RGBA2" << endl;
format = GL_RGBA;
type = GL_UNSIGNED_SHORT_5_5_5_1;
bitsPerPixel = 16;
break;
default:
break;
}
for (int level = 0; level < description.MipCount; ++level) {
GLsizei size = width * height * bitsPerPixel / 8;
glTexImage2D(GL_TEXTURE_2D, level, format, width, height, 0, format, type, data);
data += size;
width >>= 1; height >>= 1;
}
}*/
_resourceManager->UnloadImage();
return description;
}
void RenderingEngine::Initialize(const vector<ISurface*>& surfaces)
{
vector<ISurface*>::const_iterator surface;
for (surface = surfaces.begin(); surface != surfaces.end(); ++surface) {
// Create the VBO for the vertices.
vector<float> vertices;
unsigned char vertexFlags = VertexFlagsNormals | VertexFlagsTexCoords;
(*surface)->GenerateVertices(vertices, vertexFlags);
GLuint vertexBuffer;
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBufferData(GL_ARRAY_BUFFER,
vertices.size() * sizeof(vertices[0]),
&vertices[0],
GL_STATIC_DRAW);
// Create a new VBO for the indices if needed.
int indexCount = (*surface)->GetTriangleIndexCount();
GLuint indexBuffer;
if (!m_drawables.empty() && indexCount == m_drawables[0].IndexCount) {
indexBuffer = m_drawables[0].IndexBuffer;
} else {
vector<GLushort> indices(indexCount);
(*surface)->GenerateTriangleIndices(indices);
glGenBuffers(1, &indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
indexCount * sizeof(GLushort),
&indices[0],
GL_STATIC_DRAW);
}
Drawable drawable = { vertexBuffer, indexBuffer, indexCount};
m_drawables.push_back(drawable);
}
// Extract width and height from the color buffer.
int width, height;
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES,
GL_RENDERBUFFER_WIDTH_OES, &width);
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES,
GL_RENDERBUFFER_HEIGHT_OES, &height);
// Create a depth buffer that has the same size as the color buffer.
glGenRenderbuffersOES(1, &m_depthRenderbuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, m_depthRenderbuffer);
glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_DEPTH_COMPONENT16_OES,
width, height);
// Create the framebuffer object.
GLuint framebuffer;
glGenFramebuffersOES(1, &framebuffer);
glBindFramebufferOES(GL_FRAMEBUFFER_OES, framebuffer);
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES,
GL_RENDERBUFFER_OES, m_colorRenderbuffer);
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES,
GL_RENDERBUFFER_OES, m_depthRenderbuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, m_colorRenderbuffer);
void* pixels;
ivec2 size;
// Load the background texture.
glGenTextures(1, &m_backgroundTexture);
glBindTexture(GL_TEXTURE_2D, m_backgroundTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
m_resourceManager->LoadPngImage("Background");
pixels = m_resourceManager->GetImageData();
size = m_resourceManager->GetImageSize();
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, size.x, size.y, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
m_resourceManager->UnloadImage();
// Load the checkboard texture.
glGenTextures(1, &m_gridTexture);
glBindTexture(GL_TEXTURE_2D, m_gridTexture);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
m_resourceManager->LoadPngImage("Checkerboard");
pixels = m_resourceManager->GetImageData();
size = m_resourceManager->GetImageSize();
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, size.x, size.y, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, pixels);
m_resourceManager->UnloadImage();
// Set up various GL state.
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
// Set up the material properties.
vec4 specular(0.5f, 0.5f, 0.5f, 1);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular.Pointer());
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 50.0f);
m_translation = mat4::Translate(0, 0, -7);
}
void RenderingEngine::Initialize(const vector<ISurface*>& surfaces)
{
vector<ISurface*>::const_iterator surface;
for (surface = surfaces.begin(); surface != surfaces.end(); ++surface) {
// Create the VBO for the vertices.
vector<float> vertices;
(*surface)->GenerateVertices(vertices, VertexFlagsNormals|VertexFlagsTexCoords);
GLuint vertexBuffer;
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBufferData(GL_ARRAY_BUFFER,
vertices.size() * sizeof(vertices[0]),
&vertices[0],
GL_STATIC_DRAW);
// Create a new VBO for the indices if needed.
int indexCount = (*surface)->GetTriangleIndexCount();
GLuint indexBuffer;
if (!m_drawables.empty() && indexCount == m_drawables[0].IndexCount) {
indexBuffer = m_drawables[0].IndexBuffer;
} else {
vector<GLushort> indices(indexCount);
(*surface)->GenerateTriangleIndices(indices);
glGenBuffers(1, &indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
indexCount * sizeof(GLushort),
&indices[0],
GL_STATIC_DRAW);
}
int lineIndexCount = (*surface)->GetLineIndexCount();
GLuint lineIndexBuffer;
vector<GLushort> lineIndices(lineIndexCount);
(*surface)->GenerateLineIndices(lineIndices);
glGenBuffers(1, &lineIndexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, lineIndexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
lineIndexCount * sizeof(GLushort),
&lineIndices[0],
GL_STATIC_DRAW);
Drawable drawable = { vertexBuffer, indexBuffer , indexCount};
m_drawables.push_back(drawable);
}
// Extract width and height.
int width, height;
glGetRenderbufferParameteriv(GL_RENDERBUFFER,
GL_RENDERBUFFER_WIDTH, &width);
glGetRenderbufferParameteriv(GL_RENDERBUFFER,
GL_RENDERBUFFER_HEIGHT, &height);
// Create a depth buffer that has the same size as the color buffer.
glGenRenderbuffers(1, &m_depthRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, m_depthRenderbuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height);
// Create the framebuffer object.
GLuint framebuffer;
glGenFramebuffers(1, &framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, m_colorRenderbuffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, m_depthRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, m_colorRenderbuffer);
// Create the GLSL program.
GLuint program = BuildProgram(SimpleVertexShader, SimpleFragmentShader);
glUseProgram(program);
// Extract the handles to attributes and uniforms.
m_attributes.Position = glGetAttribLocation(program, "Position");
m_attributes.Normal = glGetAttribLocation(program, "Normal");
m_attributes.Diffuse = glGetAttribLocation(program, "DiffuseMaterial");
m_attributes.TextureCoord = glGetAttribLocation(program, "TextureCoord");
m_uniforms.Projection = glGetUniformLocation(program, "Projection");
m_uniforms.Modelview = glGetUniformLocation(program, "Modelview");
m_uniforms.NormalMatrix = glGetUniformLocation(program, "NormalMatrix");
m_uniforms.LightPosition = glGetUniformLocation(program, "LightPosition");
m_uniforms.AmbientMaterial = glGetUniformLocation(program, "AmbientMaterial");
m_uniforms.SpecularMaterial = glGetUniformLocation(program, "SpecularMaterial");
m_uniforms.Shininess = glGetUniformLocation(program, "Shininess");
// Set up some default material parameters.
glUniform3f(m_uniforms.AmbientMaterial, 0.04f, 0.04f, 0.04f);
glUniform3f(m_uniforms.SpecularMaterial, 0.5, 0.5, 0.5);
glUniform1f(m_uniforms.Shininess, 50);
// Set the active sampler to stage 0. Not really necessary since the uniform
// defaults to zero anyway, but good practice.
glActiveTexture(GL_TEXTURE0);
glUniform1i(m_uniforms.Sampler, 0);
// Load the texture.
glGenTextures(1,&m_gridTexture);
glBindTexture(GL_TEXTURE_2D, m_gridTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
m_resourceManager = CreateResourceManager();
m_resourceManager->LoadPngImage("Grid16.png");
void* pixels = m_resourceManager->GetImageData();
ivec2 size = m_resourceManager->GetImageSize();
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.x,
size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
m_resourceManager->UnloadImage();
// Initialize various state.
glEnableVertexAttribArray(m_attributes.Position);
glEnableVertexAttribArray(m_attributes.Normal);
glEnableVertexAttribArray(m_attributes.TextureCoord);
glEnable(GL_DEPTH_TEST);
// Set up transforms.
m_translation = mat4::Translate(0, 0, -7);
}
