100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
#include "eglcommon.h"
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#include <VG/openvg.h>
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#include <stdio.h>
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#include <string.h>
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static const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
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static VGPath path;
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static VGPaint fill;
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VGfloat centeredGradient[5] = {200.0f, 200.0f, 200.0f, 200.0f, 100};
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VGfloat noncenteredGradient[5] = {200.0f, 200.0f, 250.0f, 250.0f, 100};
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VGfloat *radialGradient = centeredGradient;
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VGColorRampSpreadMode spread = VG_COLOR_RAMP_SPREAD_PAD;
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static void
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init(void)
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{
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static const VGubyte sqrCmds[5] = {VG_MOVE_TO_ABS, VG_HLINE_TO_ABS, VG_VLINE_TO_ABS, VG_HLINE_TO_ABS, VG_CLOSE_PATH};
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static const VGfloat sqrCoords[5] = {0.0f, 0.0f, 400.0f, 400.0f, 0.0f};
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VGfloat rampStop[] = {0.00f, 1.0f, 1.0f, 1.0f, 1.0f,
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0.33f, 1.0f, 0.0f, 0.0f, 1.0f,
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0.66f, 0.0f, 1.0f, 0.0f, 1.0f,
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1.00f, 0.0f, 0.0f, 1.0f, 1.0f};
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path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1, 0, 0, 0,
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VG_PATH_CAPABILITY_APPEND_TO);
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vgAppendPathData(path, 5, sqrCmds, sqrCoords);
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fill = vgCreatePaint();
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vgSetPaint(fill, VG_FILL_PATH);
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vgSetParameteri(fill, VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT);
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vgSetParameteri(fill, VG_PAINT_COLOR_RAMP_SPREAD_MODE, spread);
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vgSetParameterfv(fill, VG_PAINT_RADIAL_GRADIENT, 5, radialGradient);
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vgSetParameterfv(fill, VG_PAINT_COLOR_RAMP_STOPS, 20, rampStop);
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vgSetfv(VG_CLEAR_COLOR, 4, white_color);
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}
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/* new window size or exposure */
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static void
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reshape(int w, int h)
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{
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vgLoadIdentity();
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}
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static void
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draw(void)
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{
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vgClear(0, 0, window_width(), window_height());
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vgDrawPath(path, VG_FILL_PATH);
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vgFlush();
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}
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int main(int argc, char **argv)
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{
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VGint i;
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for (i = 1; i < argc; ++i) {
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const char *arg = argv[i];
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if (!strcmp("-pad", arg))
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spread = VG_COLOR_RAMP_SPREAD_PAD;
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else if (!strcmp("-repeat", arg))
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spread = VG_COLOR_RAMP_SPREAD_REPEAT;
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else if (!strcmp("-reflect", arg))
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spread = VG_COLOR_RAMP_SPREAD_REFLECT;
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else if (!strcmp("-center", arg)) {
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printf("Centered radial gradient\n");
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radialGradient = centeredGradient;
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} else if (!strcmp("-noncenter", arg)) {
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printf("Non centered radial gradient\n");
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radialGradient = noncenteredGradient;
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}
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}
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switch(spread) {
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case VG_COLOR_RAMP_SPREAD_PAD:
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printf("Using spread mode: pad\n");
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break;
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case VG_COLOR_RAMP_SPREAD_REPEAT:
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printf("Using spread mode: repeat\n");
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break;
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case VG_COLOR_RAMP_SPREAD_REFLECT:
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printf("Using spread mode: reflect\n");
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}
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set_window_size(400, 400);
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return run(argc, argv, init, reshape,
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draw, 0);
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}
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