blob: ba08aecab7670bff4f885b012ea9d6fb407f1e3c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
#include <mbgl/gl/headless_backend.hpp>
#include <mbgl/gl/context.hpp>
#include <mbgl/renderer/backend_scope.hpp>
#include <cassert>
#include <stdexcept>
#include <type_traits>
namespace mbgl {
class HeadlessBackend::View {
public:
View(gl::Context& context, Size size_)
: color(context.createRenderbuffer<gl::RenderbufferType::RGBA>(size_)),
depthStencil(context.createRenderbuffer<gl::RenderbufferType::DepthStencil>(size_)),
framebuffer(context.createFramebuffer(color, depthStencil)) {
}
gl::Renderbuffer<gl::RenderbufferType::RGBA> color;
gl::Renderbuffer<gl::RenderbufferType::DepthStencil> depthStencil;
gl::Framebuffer framebuffer;
};
HeadlessBackend::HeadlessBackend(Size size_)
: size(size_) {
}
HeadlessBackend::~HeadlessBackend() {
BackendScope guard { *this };
view.reset();
context.reset();
}
gl::ProcAddress HeadlessBackend::getExtensionFunctionPointer(const char* name) {
assert(impl);
return impl->getExtensionFunctionPointer(name);
}
void HeadlessBackend::activate() {
active = true;
if (!impl) {
createImpl();
}
assert(impl);
impl->activateContext();
}
void HeadlessBackend::deactivate() {
assert(impl);
impl->deactivateContext();
active = false;
}
void HeadlessBackend::bind() {
gl::Context& context_ = getContext();
if (!view) {
view = std::make_unique<View>(context_, size);
}
context_.bindFramebuffer = view->framebuffer.framebuffer;
context_.scissorTest = false;
context_.viewport = { 0, 0, size };
}
Size HeadlessBackend::getFramebufferSize() const {
return size;
}
void HeadlessBackend::updateAssumedState() {
// no-op
}
void HeadlessBackend::setSize(Size size_) {
size = size_;
view.reset();
}
PremultipliedImage HeadlessBackend::readStillImage() {
return getContext().readFramebuffer<PremultipliedImage>(size);
}
} // namespace mbgl
|