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91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
#ifndef _IMAGECOMPONENT_H_
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#define _IMAGECOMPONENT_H_
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#include "../platform.h"
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#include GLHEADER
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#include "../GuiComponent.h"
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#include <string>
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#include <memory>
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#include "../resources/TextureResource.h"
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class ImageComponent : public GuiComponent
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{
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public:
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ImageComponent(Window* window);
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virtual ~ImageComponent();
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//Loads the image at the given filepath. Will tile if tile is true (retrieves texture as tiling, creates vertices accordingly).
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void setImage(std::string path, bool tile = false);
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//Loads an image from memory.
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void setImage(const char* image, size_t length, bool tile = false);
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//Use an already existing texture.
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void setImage(const std::shared_ptr<TextureResource>& texture);
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void onSizeChanged() override;
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void setOpacity(unsigned char opacity) override;
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//Sets the origin as a percentage of this image (e.g. (0, 0) is top left, (0.5, 0.5) is the center)
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void setOrigin(float originX, float originY);
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inline void setOrigin(Eigen::Vector2f origin) { setOrigin(origin.x(), origin.y()); }
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// Resize the image to fit this size. If one axis is zero, scale that axis to maintain aspect ratio.
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// If both are non-zero, potentially break the aspect ratio. If both are zero, no resizing.
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// Can be set before or after an image is loaded.
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// setMaxSize() and setResize() are mutually exclusive.
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void setResize(float width, float height);
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inline void setResize(const Eigen::Vector2f& size) { setResize(size.x(), size.y()); }
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// Resize the image to be as large as possible but fit within a box of this size.
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// Can be set before or after an image is loaded.
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// Never breaks the aspect ratio. setMaxSize() and setResize() are mutually exclusive.
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void setMaxSize(float width, float height);
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inline void setMaxSize(const Eigen::Vector2f& size) { setMaxSize(size.x(), size.y()); }
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// Multiply all pixels in the image by this color when rendering.
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void setColorShift(unsigned int color);
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void setFlipX(bool flip); // Mirror on the X axis.
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void setFlipY(bool flip); // Mirror on the Y axis.
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// Returns the size of the current texture, or (0, 0) if none is loaded. May be different than drawn size (use getSize() for that).
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Eigen::Vector2i getTextureSize() const;
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// Returns the center point of the image (takes origin into account).
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Eigen::Vector2f getCenter() const;
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bool hasImage();
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void render(const Eigen::Affine3f& parentTrans) override;
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virtual void applyTheme(const std::shared_ptr<ThemeData>& theme, const std::string& view, const std::string& element, unsigned int properties) override;
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virtual std::vector<HelpPrompt> getHelpPrompts() override;
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private:
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Eigen::Vector2f mTargetSize;
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Eigen::Vector2f mOrigin;
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bool mFlipX, mFlipY, mTargetIsMax;
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// Calculates the correct mSize from our resizing information (set by setResize/setMaxSize).
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// Used internally whenever the resizing parameters or texture change.
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void resize();
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struct Vertex
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{
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Eigen::Vector2f pos;
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Eigen::Vector2f tex;
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} mVertices[6];
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GLubyte mColors[6*4];
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void updateVertices();
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void updateColors();
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unsigned int mColorShift;
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std::shared_ptr<TextureResource> mTexture;
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};
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#endif
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