139 lines
2.8 KiB
C++
139 lines
2.8 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include "ui/gl/gl_math.h"
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#include <QtGui/QOpenGLFunctions>
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namespace Ui::GL {
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namespace details {
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void GenerateTextures(
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QOpenGLFunctions &f,
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gsl::span<GLuint> values,
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GLint filter,
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GLint clamp);
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void DestroyTextures(QOpenGLFunctions &f, gsl::span<GLuint> values);
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void GenerateFramebuffers(QOpenGLFunctions &f, gsl::span<GLuint> values);
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void DestroyFramebuffers(QOpenGLFunctions &f, gsl::span<GLuint> values);
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} // namespace details
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template <size_t Count>
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class Textures final {
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public:
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static_assert(Count > 0);
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void ensureCreated(
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QOpenGLFunctions &f,
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GLint filter = GL_LINEAR,
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GLint clamp = GL_CLAMP_TO_EDGE) {
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if (!created()) {
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details::GenerateTextures(
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f,
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gsl::make_span(_values),
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filter,
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clamp);
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}
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}
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void destroy(QOpenGLFunctions &f) {
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if (created()) {
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details::DestroyTextures(f, gsl::make_span(_values));
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}
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}
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void bind(QOpenGLFunctions &f, int index) const {
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Expects(index >= 0 && index < Count);
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f.glBindTexture(GL_TEXTURE_2D, _values[index]);
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}
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[[nodiscard]] GLuint id(int index) const {
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Expects(index >= 0 && index < Count);
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return _values[index];
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}
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[[nodiscard]] bool created() const {
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return (_values[0] != 0);
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}
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private:
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std::array<GLuint, Count> _values = { { 0 } };
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};
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template <size_t Count>
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class Framebuffers final {
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public:
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static_assert(Count > 0);
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void ensureCreated(QOpenGLFunctions &f) {
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if (!created()) {
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details::GenerateFramebuffers(f, gsl::make_span(_values));
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}
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}
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void destroy(QOpenGLFunctions &f) {
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if (created()) {
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details::DestroyFramebuffers(f, gsl::make_span(_values));
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}
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}
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void bind(QOpenGLFunctions &f, int index) const {
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Expects(index >= 0 && index < Count);
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f.glBindFramebuffer(GL_FRAMEBUFFER, _values[index]);
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}
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[[nodiscard]] bool created() const {
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return (_values[0] != 0);
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}
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private:
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std::array<GLuint, Count> _values = { { 0 } };
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};
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struct TexturedRect {
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Rect geometry;
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Rect texture;
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};
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class Image final {
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public:
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void setImage(QImage image, QSize subimage = QSize());
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[[nodiscard]] const QImage &image() const;
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[[nodiscard]] QImage takeImage();
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void invalidate();
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void bind(QOpenGLFunctions &f);
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void destroy(QOpenGLFunctions &f);
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[[nodiscard]] TexturedRect texturedRect(
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const QRect &geometry,
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const QRect &texture,
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const QRect &clip = QRect());
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explicit operator bool() const {
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return !_image.isNull();
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}
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private:
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QImage _image;
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QImage _storage;
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Textures<1> _textures;
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qint64 _cacheKey = 0;
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QSize _subimage;
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QSize _textureSize;
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};
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[[nodiscard]] GLint CurrentSingleComponentFormat();
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} // namespace Ui::GL
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