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Sampling - free gourad triangle mesh

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Jakub Melka
2021-03-13 15:05:15 +01:00
parent 15b610482c
commit 47bb1c3216
3 changed files with 246 additions and 34 deletions
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26
Pdf4QtLib/sources/pdfpattern.h
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@@ -335,6 +335,9 @@ public:
/// Returns matrix transforming pattern space to device space
QMatrix getPatternSpaceToDeviceSpaceMatrix(const PDFMeshQualitySettings& settings) const;
/// Returns matrix transforming pattern space to device space
QMatrix getPatternSpaceToDeviceSpaceMatrix(const QMatrix& userSpaceToDeviceSpaceMatrix) const;
/// Create sampler which can compute shading colors in device space coordinates. If sampler can't
/// be created (or shading is invalid), then nullptr is returned.
/// \param userSpaceToDeviceSpaceMatrix Matrix, which transforms user space points
@@ -434,12 +437,12 @@ class PDFType4567Shading : public PDFShadingPattern
public:
explicit PDFType4567Shading() = default;
protected:
friend class PDFPattern;
/// Returns color for given color or function parameter
PDFColor getColor(PDFColor colorOrFunctionParameter) const;
protected:
friend class PDFPattern;
void addSubdividedTriangles(const PDFMeshQualitySettings& settings,
PDFMesh& mesh,
uint32_t v1,
@@ -477,9 +480,26 @@ public:
virtual ShadingType getShadingType() const override;
virtual PDFMesh createMesh(const PDFMeshQualitySettings& settings, const PDFCMS* cms, RenderingIntent intent, PDFRenderErrorReporter* reporter) const override;
virtual PDFShadingSampler* createSampler(QMatrix userSpaceToDeviceSpaceMatrix) const override;
private:
struct VertexData
{
uint32_t index = 0;
uint8_t flags = 0;
QPointF position;
PDFColor color;
};
friend class PDFPattern;
using InitializeFunction = std::function<void(std::vector<QPointF>&&, size_t)>;
using AddTriangleFunction = std::function<void(const VertexData*, const VertexData*, const VertexData*)>;
bool processTriangles(InitializeFunction initializeMeshFunction,
AddTriangleFunction addTriangle,
const QMatrix& userSpaceToDeviceSpaceMatrix,
bool convertColors) const;
};
class PDFLatticeFormGouradTriangleShading : public PDFType4567Shading