65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
#include <mbgl/gl/offscreen_view.hpp>
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#include <mbgl/gl/context.hpp>
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#include <mbgl/gl/framebuffer.hpp>
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#include <mbgl/gl/renderbuffer.hpp>
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#include <mbgl/util/optional.hpp>
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#include <cstring>
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#include <cassert>
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namespace mbgl {
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class OffscreenView::Impl {
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public:
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Impl(gl::Context& context_, const Size size_) : context(context_), size(std::move(size_)) {
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assert(!size.isEmpty());
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}
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void bind() {
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if (!framebuffer) {
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color = context.createRenderbuffer<gl::RenderbufferType::RGBA>(size);
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depthStencil = context.createRenderbuffer<gl::RenderbufferType::DepthStencil>(size);
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framebuffer = context.createFramebuffer(*color, *depthStencil);
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} else {
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context.bindFramebuffer = framebuffer->framebuffer;
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}
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context.viewport = { 0, 0, size };
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}
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PremultipliedImage readStillImage() {
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return context.readFramebuffer<PremultipliedImage>(size);
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}
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const Size& getSize() const {
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return size;
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}
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private:
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gl::Context& context;
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const Size size;
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optional<gl::Framebuffer> framebuffer;
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optional<gl::Renderbuffer<gl::RenderbufferType::RGBA>> color;
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optional<gl::Renderbuffer<gl::RenderbufferType::DepthStencil>> depthStencil;
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};
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OffscreenView::OffscreenView(gl::Context& context, const Size size)
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: impl(std::make_unique<Impl>(context, std::move(size))) {
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}
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OffscreenView::~OffscreenView() = default;
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void OffscreenView::bind() {
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impl->bind();
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}
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PremultipliedImage OffscreenView::readStillImage() {
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return impl->readStillImage();
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}
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const Size& OffscreenView::getSize() const {
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return impl->getSize();
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}
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} // namespace mbgl
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