121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
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// 7 september 2015
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#include "area.h"
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struct uiDrawContext {
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HDC mainDC;
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// when drawing in RGBA mode, we need to use this
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HDC alphaDC;
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HBITMAP alphaBitmap;
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// and this is the DC we actually draw to, either mainDC or alphaDC
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HDC currentDC;
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// source color
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BOOL useRGB;
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BOOL useAlpha;
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uint8_t r;
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uint8_t g;
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uint8_t b;
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uint8_t a;
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};
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uiDrawContext *newContext(HDC dc)
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{
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uiDrawContext *c;
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c = (uiDrawContext *) g_malloc0(sizeof (uiDrawContext));
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c->mainDC = dc;
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return c;
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}
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void uiDrawBeginPathRGB(uiDrawContext *c, uint8_t r, uint8_t g, uint8_t b)
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{
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c->useRGB = TRUE;
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c->useAlpha = FALSE;
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c->r = r;
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c->g = g;
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c->b = b;
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c->currentDC = c->mainDC;
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if (BeginPath(c->currentDC) == 0)
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logLastError("error beginning new path in uiDrawBeginPathRGB()");
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}
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void uiDrawBeginPathRGBA(uiDrawContext *c, uint8_t r, uint8_t g, uint8_t b, uint8_t a)
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{
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// TODO
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}
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void uiDrawMoveTo(uiDrawContext *c, intmax_t x, intmax_t y)
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{
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if (MoveToEx(c->currentDC, x, y, NULL) == 0)
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logLastError("error moving to point in uiDrawMoveTo()");
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}
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void uiDrawLineTo(uiDrawContext *c, intmax_t x, intmax_t y)
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{
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if (LineTo(c->currentDC, x, y) == 0)
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logLastError("error drawing line in uiDrawLineTo()");
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}
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void uiDrawRectangle(uiDrawContext *c, intmax_t x, intmax_t y, intmax_t width, intmax_t height)
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{
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if (Rectangle(c->currentDC, x, y, x + width, y + height) == 0)
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logLastError("error drawing rectangle in uiDrawRectangle()");
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}
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void uiDrawArc(uiDrawContext *c, intmax_t xCenter, intmax_t yCenter, intmax_t radius, double startAngle, double endAngle, int lineFromCurrentPointToStart)
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{
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if (!lineFromCurrentPointToStart) {
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// TODO
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}
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// TODO convert radians to degrees
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if (AngleArc(c->currentDC,
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xCenter, yCenter
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radius,
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startAngle,
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// the "sweep angle" is relative to the start angle, not to 0
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endAngle - startAngle) == 0)
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logLastError("error drawing arc in uiDrawArc()");
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}
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void uiDrawCloseFigure(uiDrawContext *c)
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{
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if (CloseFigure(c->currentDC) == 0)
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logLastError("error closing figure in uiDrawCloseFigure()");
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}
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void uiDrawStroke(uiDrawContext *c, uiDrawStrokeParams *p)
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{
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// TODO
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switch (p->Cap) {
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case uiDrawLineCapFlat:
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break;
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case uiDrawLineCapRound:
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break;
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case uiDrawLineCapSquare:
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break;
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}
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switch (p->Join) {
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case uiDrawLineJoinMiter:
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break;
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case uiDrawLineJoinRound:
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break;
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case uiDrawLineJoinBevel:
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break;
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}
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}
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void uiDrawFill(uiDrawContext *c, uiDrawFillMode mode)
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{
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// TODO
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switch (mode) {
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case uiDrawFillModeWinding:
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break;
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case uiDrawFillModeAlternate:
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break;
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}
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}
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