diff options
Diffstat (limited to '3rdparty/bgfx/examples/common/nanovg/nanovg.h')
-rw-r--r-- | 3rdparty/bgfx/examples/common/nanovg/nanovg.h | 78 |
1 files changed, 65 insertions, 13 deletions
diff --git a/3rdparty/bgfx/examples/common/nanovg/nanovg.h b/3rdparty/bgfx/examples/common/nanovg/nanovg.h index 984c1935e3c..99797e21fbb 100644 --- a/3rdparty/bgfx/examples/common/nanovg/nanovg.h +++ b/3rdparty/bgfx/examples/common/nanovg/nanovg.h @@ -81,10 +81,46 @@ enum NVGalign { // Vertical align NVG_ALIGN_TOP = 1<<3, // Align text vertically to top. NVG_ALIGN_MIDDLE = 1<<4, // Align text vertically to middle. - NVG_ALIGN_BOTTOM = 1<<5, // Align text vertically to bottom. - NVG_ALIGN_BASELINE = 1<<6, // Default, align text vertically to baseline. + NVG_ALIGN_BOTTOM = 1<<5, // Align text vertically to bottom. + NVG_ALIGN_BASELINE = 1<<6, // Default, align text vertically to baseline. }; +enum NVGblendFactor { + NVG_ZERO = 1<<0, + NVG_ONE = 1<<1, + NVG_SRC_COLOR = 1<<2, + NVG_ONE_MINUS_SRC_COLOR = 1<<3, + NVG_DST_COLOR = 1<<4, + NVG_ONE_MINUS_DST_COLOR = 1<<5, + NVG_SRC_ALPHA = 1<<6, + NVG_ONE_MINUS_SRC_ALPHA = 1<<7, + NVG_DST_ALPHA = 1<<8, + NVG_ONE_MINUS_DST_ALPHA = 1<<9, + NVG_SRC_ALPHA_SATURATE = 1<<10, +}; + +enum NVGcompositeOperation { + NVG_SOURCE_OVER, + NVG_SOURCE_IN, + NVG_SOURCE_OUT, + NVG_ATOP, + NVG_DESTINATION_OVER, + NVG_DESTINATION_IN, + NVG_DESTINATION_OUT, + NVG_DESTINATION_ATOP, + NVG_LIGHTER, + NVG_COPY, + NVG_XOR, +}; + +struct NVGcompositeOperationState { + int srcRGB; + int dstRGB; + int srcAlpha; + int dstAlpha; +}; +typedef struct NVGcompositeOperationState NVGcompositeOperationState; + struct NVGglyphPosition { const char* str; // Position of the glyph in the input string. float x; // The x-coordinate of the logical glyph position. @@ -126,6 +162,22 @@ void nvgCancelFrame(NVGcontext* ctx); void nvgEndFrame(NVGcontext* ctx); // +// Composite operation +// +// The composite operations in NanoVG are modeled after HTML Canvas API, and +// the blend func is based on OpenGL (see corresponding manuals for more info). +// The colors in the blending state have premultiplied alpha. + +// Sets the composite operation. The op parameter should be one of NVGcompositeOperation. +void nvgGlobalCompositeOperation(NVGcontext* ctx, int op); + +// Sets the composite operation with custom pixel arithmetic. The parameters should be one of NVGblendFactor. +void nvgGlobalCompositeBlendFunc(NVGcontext* ctx, int sfactor, int dfactor); + +// Sets the composite operation with custom pixel arithmetic for RGB and alpha components separately. The parameters should be one of NVGblendFactor. +void nvgGlobalCompositeBlendFuncSeparate(NVGcontext* ctx, int srcRGB, int dstRGB, int srcAlpha, int dstAlpha); + +// // Color utils // // Colors in NanoVG are stored as unsigned ints in ABGR format. @@ -185,7 +237,7 @@ void nvgReset(NVGcontext* ctx); // Solid color is simply defined as a color value, different kinds of paints can be created // using nvgLinearGradient(), nvgBoxGradient(), nvgRadialGradient() and nvgImagePattern(). // -// Current render style can be saved and restored using nvgSave() and nvgRestore(). +// Current render style can be saved and restored using nvgSave() and nvgRestore(). // Sets current stroke style to a solid color. void nvgStrokeColor(NVGcontext* ctx, NVGcolor color); @@ -215,7 +267,7 @@ void nvgLineCap(NVGcontext* ctx, int cap); void nvgLineJoin(NVGcontext* ctx, int join); // Sets the transparency applied to all rendered shapes. -// Alreade transparent paths will get proportionally more transparent as well. +// Already transparent paths will get proportionally more transparent as well. void nvgGlobalAlpha(NVGcontext* ctx, float alpha); // @@ -233,7 +285,7 @@ void nvgGlobalAlpha(NVGcontext* ctx, float alpha); // Apart from nvgResetTransform(), each transformation function first creates // specific transformation matrix and pre-multiplies the current transformation by it. // -// Current coordinate system (transformation) can be saved and restored using nvgSave() and nvgRestore(). +// Current coordinate system (transformation) can be saved and restored using nvgSave() and nvgRestore(). // Resets current transform to a identity matrix. void nvgResetTransform(NVGcontext* ctx); @@ -347,7 +399,7 @@ NVGpaint nvgLinearGradient(NVGcontext* ctx, float sx, float sy, float ex, float NVGcolor icol, NVGcolor ocol); // Creates and returns a box gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering -// drop shadows or hilights for boxes. Parameters (x,y) define the top-left corner of the rectangle, +// drop shadows or highlights for boxes. Parameters (x,y) define the top-left corner of the rectangle, // (w,h) define the size of the rectangle, r defines the corner radius, and f feather. Feather defines how blurry // the border of the rectangle is. Parameter icol specifies the inner color and ocol the outer color of the gradient. // The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint(). @@ -369,8 +421,8 @@ NVGpaint nvgImagePattern(NVGcontext* ctx, float ox, float oy, float ex, float ey // // Scissoring // -// Scissoring allows you to clip the rendering into a rectangle. This is useful for varius -// user interface cases like rendering a text edit or a timeline. +// Scissoring allows you to clip the rendering into a rectangle. This is useful for various +// user interface cases like rendering a text edit or a timeline. // Sets the current scissor rectangle. // The scissor rectangle is transformed by the current transform. @@ -425,7 +477,7 @@ void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float rad // Closes current sub-path with a line segment. void nvgClosePath(NVGcontext* ctx); -// Sets the current sub-path winding, see NVGwinding and NVGsolidity. +// Sets the current sub-path winding, see NVGwinding and NVGsolidity. void nvgPathWinding(NVGcontext* ctx, int dir); // Creates new circle arc shaped sub-path. The arc center is at cx,cy, the arc radius is r, @@ -442,7 +494,7 @@ void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r // Creates new ellipse shaped sub-path. void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry); -// Creates new circle shaped sub-path. +// Creates new circle shaped sub-path. void nvgCircle(NVGcontext* ctx, float cx, float cy, float r); // Fills the current path with current fill style. @@ -489,7 +541,7 @@ void nvgStroke(NVGcontext* ctx); // Returns handle to the font. int nvgCreateFont(NVGcontext* ctx, const char* name, const char* filename); -// Creates image by loading it from the specified memory chunk. +// Creates font by loading it from the specified memory chunk. // Returns handle to the font. int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData); @@ -505,7 +557,7 @@ void nvgFontBlur(NVGcontext* ctx, float blur); // Sets the letter spacing of current text style. void nvgTextLetterSpacing(NVGcontext* ctx, float spacing); -// Sets the proportional line height of current text style. The line height is specified as multiple of font size. +// Sets the proportional line height of current text style. The line height is specified as multiple of font size. void nvgTextLineHeight(NVGcontext* ctx, float lineHeight); // Sets the text align of current text style, see NVGalign for options. @@ -592,7 +644,7 @@ struct NVGparams { int (*renderGetTextureSize)(void* uptr, int image, int* w, int* h); void (*renderViewport)(void* uptr, int width, int height, float devicePixelRatio); void (*renderCancel)(void* uptr); - void (*renderFlush)(void* uptr); + void (*renderFlush)(void* uptr, NVGcompositeOperationState compositeOperation); void (*renderFill)(void* uptr, NVGpaint* paint, NVGscissor* scissor, float fringe, const float* bounds, const NVGpath* paths, int npaths); void (*renderStroke)(void* uptr, NVGpaint* paint, NVGscissor* scissor, float fringe, float strokeWidth, const NVGpath* paths, int npaths); void (*renderTriangles)(void* uptr, NVGpaint* paint, NVGscissor* scissor, const NVGvertex* verts, int nverts); |