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| |
| #ifndef QSGOPENGLATLASTEXTURE_P_H |
| #define QSGOPENGLATLASTEXTURE_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/QSize> |
| |
| #include <QtGui/qopengl.h> |
| |
| #include <QtQuick/QSGTexture> |
| #include <QtQuick/private/qsgplaintexture_p.h> |
| #include <QtQuick/private/qsgareaallocator_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QSGCompressedAtlasTexture { |
| class Atlas; |
| } |
| class QSGCompressedTextureFactory; |
| |
| namespace QSGOpenGLAtlasTexture |
| { |
| |
| class Texture; |
| class TextureBase; |
| class Atlas; |
| |
| class Manager : public QObject |
| { |
| Q_OBJECT |
| |
| public: |
| Manager(const QSize &surfacePixelSize); |
| ~Manager(); |
| |
| QSGTexture *create(const QImage &image, bool hasAlphaChannel); |
| QSGTexture *create(const QSGCompressedTextureFactory *factory); |
| void invalidate(); |
| |
| private: |
| Atlas *m_atlas; |
| // set of atlases for different compressed formats |
| QHash<unsigned int, QSGCompressedAtlasTexture::Atlas*> m_atlases; |
| |
| QSize m_atlas_size; |
| int m_atlas_size_limit; |
| }; |
| |
| class AtlasBase : public QObject |
| { |
| Q_OBJECT |
| public: |
| AtlasBase(const QSize &size); |
| ~AtlasBase(); |
| |
| void invalidate(); |
| |
| int textureId() const; |
| void bind(QSGTexture::Filtering filtering); |
| |
| void remove(TextureBase *t); |
| |
| QSize size() const { return m_size; } |
| |
| protected: |
| virtual void generateTexture() = 0; |
| virtual void uploadPendingTexture(int i) = 0; |
| |
| protected: |
| QSGAreaAllocator m_allocator; |
| unsigned int m_texture_id; |
| QSize m_size; |
| QList<TextureBase *> m_pending_uploads; |
| |
| private: |
| bool m_allocated; |
| }; |
| |
| class Atlas : public AtlasBase |
| { |
| public: |
| Atlas(const QSize &size); |
| ~Atlas(); |
| |
| void generateTexture() override; |
| void uploadPendingTexture(int i) override; |
| |
| void upload(Texture *texture); |
| void uploadBgra(Texture *texture); |
| |
| Texture *create(const QImage &image); |
| |
| uint internalFormat() const { return m_internalFormat; } |
| uint externalFormat() const { return m_externalFormat; } |
| |
| private: |
| uint m_internalFormat; |
| uint m_externalFormat; |
| |
| int m_atlas_transient_image_threshold; |
| |
| uint m_use_bgra_fallback: 1; |
| uint m_debug_overlay : 1; |
| }; |
| |
| class TextureBase : public QSGTexture |
| { |
| Q_OBJECT |
| public: |
| TextureBase(AtlasBase *atlas, const QRect &textureRect); |
| ~TextureBase(); |
| |
| int textureId() const override { return m_atlas->textureId(); } |
| bool isAtlasTexture() const override { return true; } |
| |
| QRect atlasSubRect() const { return m_allocated_rect; } |
| |
| void bind() override; |
| |
| protected: |
| QRect m_allocated_rect; |
| AtlasBase *m_atlas; |
| }; |
| |
| class Texture : public TextureBase |
| { |
| Q_OBJECT |
| public: |
| Texture(Atlas *atlas, const QRect &textureRect, const QImage &image); |
| ~Texture(); |
| |
| QSize textureSize() const override { return atlasSubRectWithoutPadding().size(); } |
| void setHasAlphaChannel(bool alpha) { m_has_alpha = alpha; } |
| bool hasAlphaChannel() const override { return m_has_alpha; } |
| bool hasMipmaps() const override { return false; } |
| |
| QRectF normalizedTextureSubRect() const override { return m_texture_coords_rect; } |
| |
| QRect atlasSubRect() const { return m_allocated_rect; } |
| QRect atlasSubRectWithoutPadding() const { return m_allocated_rect.adjusted(1, 1, -1, -1); } |
| |
| QSGTexture *removedFromAtlas() const override; |
| |
| void releaseImage() { m_image = QImage(); } |
| const QImage &image() const { return m_image; } |
| |
| private: |
| QRectF m_texture_coords_rect; |
| QImage m_image; |
| mutable QSGPlainTexture *m_nonatlas_texture; |
| bool m_has_alpha; |
| }; |
| |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |