diff options
Diffstat (limited to 'thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterTexmap.h')
| -rw-r--r-- | thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterTexmap.h | 141 |
1 files changed, 93 insertions, 48 deletions
diff --git a/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterTexmap.h b/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterTexmap.h index abb57d7c45..52585162fc 100644 --- a/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterTexmap.h +++ b/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterTexmap.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2021 - 2022 Samsung Electronics Co., Ltd. All rights reserved. + * Copyright (c) 2021 - 2023 the ThorVG project. All rights reserved. * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -20,17 +20,6 @@ * SOFTWARE. */ -struct Vertex -{ - Point pt; - Point uv; -}; - -struct Polygon -{ - Vertex vertex[3]; -}; - struct AALine { int32_t x[2]; @@ -80,7 +69,7 @@ static bool _arrange(const SwImage* image, const SwBBox* region, int& yStart, in } -static void _rasterPolygonImageSegment(SwSurface* surface, const SwImage* image, const SwBBox* region, int yStart, int yEnd, uint32_t opacity, uint32_t (*blendMethod)(uint32_t), AASpans* aaSpans) +static void _rasterPolygonImageSegment(SwSurface* surface, const SwImage* image, const SwBBox* region, int yStart, int yEnd, uint32_t opacity, uint8_t(*blender)(uint8_t*), AASpans* aaSpans) { #define TEXMAP_TRANSLUCENT #define TEXMAP_MASKING @@ -90,7 +79,7 @@ static void _rasterPolygonImageSegment(SwSurface* surface, const SwImage* image, } -static void _rasterPolygonImageSegment(SwSurface* surface, const SwImage* image, const SwBBox* region, int yStart, int yEnd, uint32_t (*blendMethod)(uint32_t), AASpans* aaSpans) +static void _rasterPolygonImageSegment(SwSurface* surface, const SwImage* image, const SwBBox* region, int yStart, int yEnd, uint8_t(*blender)(uint8_t*), AASpans* aaSpans) { #define TEXMAP_MASKING #include "tvgSwRasterTexmapInternal.h" @@ -113,7 +102,7 @@ static void _rasterPolygonImageSegment(SwSurface* surface, const SwImage* image, /* This mapping algorithm is based on Mikael Kalms's. */ -static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const SwBBox* region, uint32_t opacity, Polygon& polygon, uint32_t (*blendMethod)(uint32_t), AASpans* aaSpans) +static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const SwBBox* region, uint32_t opacity, Polygon& polygon, uint8_t(*blender)(uint8_t*), AASpans* aaSpans) { float x[3] = {polygon.vertex[0].pt.x, polygon.vertex[1].pt.x, polygon.vertex[2].pt.x}; float y[3] = {polygon.vertex[0].pt.y, polygon.vertex[1].pt.y, polygon.vertex[2].pt.y}; @@ -201,9 +190,9 @@ static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const dxdyb = dxdy[0]; xb = x[0] + dy * dxdyb + (off_y * dxdyb); - if (blendMethod) { - if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], blendMethod, aaSpans); - else _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], opacity, blendMethod, aaSpans); + if (blender) { + if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], blender, aaSpans); + else _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], opacity, blender, aaSpans); } else { if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], aaSpans); else _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], opacity, aaSpans); @@ -222,9 +211,9 @@ static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const // Set right edge X-slope and perform subpixel pre-stepping dxdyb = dxdy[2]; xb = x[1] + (1 - (y[1] - yi[1])) * dxdyb + (off_y * dxdyb); - if (blendMethod) { - if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], blendMethod, aaSpans); - else _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], opacity, blendMethod, aaSpans); + if (blender) { + if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], blender, aaSpans); + else _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], opacity, blender, aaSpans); } else { if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], aaSpans); else _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], opacity, aaSpans); @@ -251,9 +240,9 @@ static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const ua = u[0] + dy * dudya + (off_y * dudya); va = v[0] + dy * dvdya + (off_y * dvdya); - if (blendMethod) { - if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], blendMethod, aaSpans); - else _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], opacity, blendMethod, aaSpans); + if (blender) { + if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], blender, aaSpans); + else _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], opacity, blender, aaSpans); } else { if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], aaSpans); else _rasterPolygonImageSegment(surface, image, region, yi[0], yi[1], opacity, aaSpans); @@ -275,9 +264,9 @@ static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const ua = u[1] + dy * dudya + (off_y * dudya); va = v[1] + dy * dvdya + (off_y * dvdya); - if (blendMethod) { - if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], blendMethod, aaSpans); - else _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], opacity, blendMethod, aaSpans); + if (blender) { + if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], blender, aaSpans); + else _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], opacity, blender, aaSpans); } else { if (opacity == 255) _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], aaSpans); else _rasterPolygonImageSegment(surface, image, region, yi[1], yi[2], opacity, aaSpans); @@ -287,18 +276,10 @@ static void _rasterPolygonImage(SwSurface* surface, const SwImage* image, const } -static AASpans* _AASpans(const Vertex* vertices, const SwImage* image, const SwBBox* region) +static AASpans* _AASpans(float ymin, float ymax, const SwImage* image, const SwBBox* region) { - //Initialize Y range - float ys = FLT_MAX, ye = -1.0f; - - for (int i = 0; i < 4; i++) { - if (vertices[i].pt.y < ys) ys = vertices[i].pt.y; - if (vertices[i].pt.y > ye) ye = vertices[i].pt.y; - } - - auto yStart = static_cast<int32_t>(ys); - auto yEnd = static_cast<int32_t>(ye); + auto yStart = static_cast<int32_t>(ymin); + auto yEnd = static_cast<int32_t>(ymax); if (!_arrange(image, region, yStart, yEnd)) return nullptr; @@ -521,7 +502,7 @@ static bool _apply(SwSurface* surface, AASpans* aaSpans) auto offset = y * surface->stride; //Left edge - dst = surface->buffer + (offset + line->x[0]); + dst = surface->buf32 + (offset + line->x[0]); if (line->x[0] > 1) pixel = *(dst - 1); else pixel = *dst; @@ -533,10 +514,10 @@ static bool _apply(SwSurface* surface, AASpans* aaSpans) } //Right edge - dst = surface->buffer + (offset + line->x[1] - 1); + dst = surface->buf32 + (offset + line->x[1] - 1); if (line->x[1] < (int32_t)(surface->w - 1)) pixel = *(dst + 1); else pixel = *dst; - + pos = width; while ((int32_t)(width - line->length[1]) < pos) { *dst = INTERPOLATE(255 - (line->coverage[1] * (line->length[1] - (width - pos))), *dst, pixel); @@ -562,12 +543,12 @@ static bool _apply(SwSurface* surface, AASpans* aaSpans) 0 -- 1 | / | | / | - 3 -- 2 + 3 -- 2 */ -static bool _rasterTexmapPolygon(SwSurface* surface, const SwImage* image, const Matrix* transform, const SwBBox* region, uint32_t opacity, uint32_t (*blendMethod)(uint32_t)) +static bool _rasterTexmapPolygon(SwSurface* surface, const SwImage* image, const Matrix* transform, const SwBBox* region, uint32_t opacity, uint8_t(*blender)(uint8_t*)) { //Exceptions: No dedicated drawing area? - if (!region && image->rle->size == 0) return false; + if ((!image->rle && !region) || (image->rle && image->rle->size == 0)) return false; /* Prepare vertices. shift XY coordinates to match the sub-pixeling technique. */ @@ -577,9 +558,15 @@ static bool _rasterTexmapPolygon(SwSurface* surface, const SwImage* image, const vertices[2] = {{float(image->w), float(image->h)}, {float(image->w), float(image->h)}}; vertices[3] = {{0.0f, float(image->h)}, {0.0f, float(image->h)}}; - for (int i = 0; i < 4; i++) mathMultiply(&vertices[i].pt, transform); + float ys = FLT_MAX, ye = -1.0f; + for (int i = 0; i < 4; i++) { + mathMultiply(&vertices[i].pt, transform); - auto aaSpans = _AASpans(vertices, image, region); + if (vertices[i].pt.y < ys) ys = vertices[i].pt.y; + if (vertices[i].pt.y > ye) ye = vertices[i].pt.y; + } + + auto aaSpans = _AASpans(ys, ye, image, region); if (!aaSpans) return true; Polygon polygon; @@ -589,14 +576,72 @@ static bool _rasterTexmapPolygon(SwSurface* surface, const SwImage* image, const polygon.vertex[1] = vertices[1]; polygon.vertex[2] = vertices[3]; - _rasterPolygonImage(surface, image, region, opacity, polygon, blendMethod, aaSpans); + _rasterPolygonImage(surface, image, region, opacity, polygon, blender, aaSpans); //Draw the second polygon polygon.vertex[0] = vertices[1]; polygon.vertex[1] = vertices[2]; polygon.vertex[2] = vertices[3]; - _rasterPolygonImage(surface, image, region, opacity, polygon, blendMethod, aaSpans); + _rasterPolygonImage(surface, image, region, opacity, polygon, blender, aaSpans); return _apply(surface, aaSpans); } + + +/* + Provide any number of triangles to draw a mesh using the supplied image. + Indexes are not used, so each triangle (Polygon) vertex has to be defined, even if they copy the previous one. + Example: + + 0 -- 1 0 -- 1 0 + | / | --> | / / | + | / | | / / | + 2 -- 3 2 1 -- 2 + + Should provide two Polygons, one for each triangle. + // TODO: region? +*/ +static bool _rasterTexmapPolygonMesh(SwSurface* surface, const SwImage* image, const RenderMesh* mesh, const Matrix* transform, const SwBBox* region, uint32_t opacity, uint8_t(*blender)(uint8_t*)) +{ + //Exceptions: No dedicated drawing area? + if ((!image->rle && !region) || (image->rle && image->rle->size == 0)) return false; + + // Step polygons once to transform + auto transformedTris = (Polygon*)malloc(sizeof(Polygon) * mesh->triangleCnt); + float ys = FLT_MAX, ye = -1.0f; + for (uint32_t i = 0; i < mesh->triangleCnt; i++) { + transformedTris[i] = mesh->triangles[i]; + mathMultiply(&transformedTris[i].vertex[0].pt, transform); + mathMultiply(&transformedTris[i].vertex[1].pt, transform); + mathMultiply(&transformedTris[i].vertex[2].pt, transform); + + if (transformedTris[i].vertex[0].pt.y < ys) ys = transformedTris[i].vertex[0].pt.y; + else if (transformedTris[i].vertex[0].pt.y > ye) ye = transformedTris[i].vertex[0].pt.y; + if (transformedTris[i].vertex[1].pt.y < ys) ys = transformedTris[i].vertex[1].pt.y; + else if (transformedTris[i].vertex[1].pt.y > ye) ye = transformedTris[i].vertex[1].pt.y; + if (transformedTris[i].vertex[2].pt.y < ys) ys = transformedTris[i].vertex[2].pt.y; + else if (transformedTris[i].vertex[2].pt.y > ye) ye = transformedTris[i].vertex[2].pt.y; + + // Convert normalized UV coordinates to image coordinates + transformedTris[i].vertex[0].uv.x *= (float)image->w; + transformedTris[i].vertex[0].uv.y *= (float)image->h; + transformedTris[i].vertex[1].uv.x *= (float)image->w; + transformedTris[i].vertex[1].uv.y *= (float)image->h; + transformedTris[i].vertex[2].uv.x *= (float)image->w; + transformedTris[i].vertex[2].uv.y *= (float)image->h; + } + + // Get AA spans and step polygons again to draw + auto aaSpans = _AASpans(ys, ye, image, region); + if (aaSpans) { + for (uint32_t i = 0; i < mesh->triangleCnt; i++) { + _rasterPolygonImage(surface, image, region, opacity, transformedTris[i], blender, aaSpans); + } + // Apply to surface (note: frees the AA spans) + _apply(surface, aaSpans); + } + free(transformedTris); + + return true; +} |