Shader::Shader(const char* name_, const char* vertexSource, const char* fragmentSource, gl::ObjectStore& store, Defines defines)
: name(name_)
, program(store.createProgram())
, vertexShader(store.createShader(GL_VERTEX_SHADER))
, fragmentShader(store.createShader(GL_FRAGMENT_SHADER))
{
util::stopwatch stopwatch("shader compilation", Event::Shader);
if (!compileShader(vertexShader, vertexSource)) {
Log::Error(Event::Shader, "Vertex shader %s failed to compile: %s", name, vertexSource);
throw util::ShaderException(std::string { "Vertex shader " } + name + " failed to compile");
}
std::string fragment(fragmentSource);
if (defines & Defines::Overdraw) {
assert(fragment.find("#ifdef OVERDRAW_INSPECTOR") != std::string::npos);
fragment.replace(fragment.find_first_of('\n'), 1, "\n#define OVERDRAW_INSPECTOR\n");
}
if (!compileShader(fragmentShader, fragment.c_str())) {
Log::Error(Event::Shader, "Fragment shader %s failed to compile: %s", name, fragmentSource);
throw util::ShaderException(std::string { "Fragment shader " } + name + " failed to compile");
}
// Attach shaders
MBGL_CHECK_ERROR(glAttachShader(program.get(), vertexShader.get()));
MBGL_CHECK_ERROR(glAttachShader(program.get(), fragmentShader.get()));
// Bind attribute variables
MBGL_CHECK_ERROR(glBindAttribLocation(program.get(), a_pos, "a_pos"));
MBGL_CHECK_ERROR(glBindAttribLocation(program.get(), a_extrude, "a_extrude"));
MBGL_CHECK_ERROR(glBindAttribLocation(program.get(), a_offset, "a_offset"));
MBGL_CHECK_ERROR(glBindAttribLocation(program.get(), a_data, "a_data"));
MBGL_CHECK_ERROR(glBindAttribLocation(program.get(), a_texture_pos, "a_texture_pos"));
// Link program
GLint status;
MBGL_CHECK_ERROR(glLinkProgram(program.get()));
MBGL_CHECK_ERROR(glGetProgramiv(program.get(), GL_LINK_STATUS, &status));
if (status == 0) {
GLint logLength;
MBGL_CHECK_ERROR(glGetProgramiv(program.get(), GL_INFO_LOG_LENGTH, &logLength));
const auto log = std::make_unique<GLchar[]>(logLength);
if (logLength > 0) {
MBGL_CHECK_ERROR(glGetProgramInfoLog(program.get(), logLength, &logLength, log.get()));
Log::Error(Event::Shader, "Program failed to link: %s", log.get());
}
throw util::ShaderException(std::string { "Program " } + name + " failed to link: " + log.get());
}
}
// Transfers this buffer to the GPU and binds the buffer to the GL context.
void bind(gl::ObjectStore& store) {
if (buffer) {
MBGL_CHECK_ERROR(glBindBuffer(bufferType, *buffer));
} else {
buffer = store.createBuffer();
MBGL_CHECK_ERROR(glBindBuffer(bufferType, *buffer));
if (array == nullptr) {
Log::Debug(Event::OpenGL, "Buffer doesn't contain elements");
pos = 0;
}
MBGL_CHECK_ERROR(glBufferData(bufferType, pos, array, GL_STATIC_DRAW));
if (!retainAfterUpload) {
cleanup();
}
}
}
void FrameHistory::bind(gl::ObjectStore& store) {
if (!texture) {
texture = store.createTexture();
MBGL_CHECK_ERROR(glBindTexture(GL_TEXTURE_2D, *texture));
#ifndef GL_ES_VERSION_2_0
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0));
#endif
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST));
} else {
MBGL_CHECK_ERROR(glBindTexture(GL_TEXTURE_2D, *texture));
}
}
void FrameHistory::bind(gl::ObjectStore& store, gl::Config& config, uint32_t unit) {
if (!texture) {
texture = store.createTexture();
config.activeTexture = unit;
config.texture[unit] = *texture;
#ifndef GL_ES_VERSION_2_0
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0));
#endif
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST));
} else if (config.texture[unit] != *texture) {
config.activeTexture = unit;
config.texture[unit] = *texture;
}
}
void SpriteAtlas::bind(bool linear, gl::ObjectStore& objectStore) {
if (!data) {
return; // Empty atlas
}
if (!texture) {
texture = objectStore.createTexture();
MBGL_CHECK_ERROR(glBindTexture(GL_TEXTURE_2D, *texture));
#ifndef GL_ES_VERSION_2_0
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0));
#endif
// We are using clamp to edge here since OpenGL ES doesn't allow GL_REPEAT on NPOT textures.
// We use those when the pixelRatio isn't a power of two, e.g. on iPhone 6 Plus.
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
fullUploadRequired = true;
} else {
MBGL_CHECK_ERROR(glBindTexture(GL_TEXTURE_2D, *texture));
}
GLuint filter_val = linear ? GL_LINEAR : GL_NEAREST;
if (filter_val != filter) {
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter_val));
MBGL_CHECK_ERROR(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter_val));
filter = filter_val;
}
if (dirty) {
std::lock_guard<std::recursive_mutex> lock(mtx);
if (fullUploadRequired) {
MBGL_CHECK_ERROR(glTexImage2D(
GL_TEXTURE_2D, // GLenum target
0, // GLint level
GL_RGBA, // GLint internalformat
pixelWidth, // GLsizei width
pixelHeight, // GLsizei height
0, // GLint border
GL_RGBA, // GLenum format
GL_UNSIGNED_BYTE, // GLenum type
data.get() // const GLvoid * data
));
fullUploadRequired = false;
} else {
MBGL_CHECK_ERROR(glTexSubImage2D(
GL_TEXTURE_2D, // GLenum target
0, // GLint level
0, // GLint xoffset
0, // GLint yoffset
pixelWidth, // GLsizei width
pixelHeight, // GLsizei height
GL_RGBA, // GLenum format
GL_UNSIGNED_BYTE, // GLenum type
data.get() // const GLvoid *pixels
));
}
dirty = false;
#ifndef GL_ES_VERSION_2_0
// platform::showColorDebugImage("Sprite Atlas", reinterpret_cast<const char*>(data.get()),
// pixelWidth, pixelHeight, pixelWidth, pixelHeight);
#endif
}
};
Impl(gl::ObjectStore& store) : pool(store.createTexturePool()), availableIDs(gl::TextureMax) {
std::copy(pool.get().begin(), pool.get().end(), availableIDs.begin());
}