99 lines
2.5 KiB
C
99 lines
2.5 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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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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VGubyte commands[5] = {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_CLOSE_PATH};
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VGfloat coords[8] = {0.0f,0.0f, 32.0f,0.0f, 32.0f,32.0f, 0.0f,32.0f };
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VGfloat rampStop[20] = {-0.5f, 1.0f, 1.0f, 1.0f, 1.0f,
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0.25f, 1.0f, 0.0f, 0.0f, 1.0f,
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0.75f, 0.0f, 0.0f, 1.0f, 1.0f,
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1.5f, 0.0f, 0.0f, 0.0f, 0.0f};
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VGfloat defaultColor[] = {1.0f, 1.0f, 1.0f, 1.0f};
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VGfloat linearGradient[4] = {0.0f, 0.0f, 0.0f, 32.0f};
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path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F,
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1.0f, 0.0f, 0, 0, VG_PATH_CAPABILITY_ALL);
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if (path == VG_INVALID_HANDLE)
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return;
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fill = vgCreatePaint();
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if (fill == VG_INVALID_HANDLE) {
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vgDestroyPath(path);
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return;
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}
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vgSetfv(VG_CLEAR_COLOR, 4, defaultColor);
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vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_NONANTIALIASED);
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vgAppendPathData(path, 5, commands, coords);
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vgSetPaint(fill, VG_FILL_PATH);
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vgSetParameteri(fill, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT);
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vgSetParameteri(fill, VG_PAINT_COLOR_RAMP_SPREAD_MODE,
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VG_COLOR_RAMP_SPREAD_REPEAT);
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vgSetParameterfv(fill, VG_PAINT_LINEAR_GRADIENT, 4, linearGradient);
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vgSetParameterfv(fill, VG_PAINT_COLOR_RAMP_STOPS, 20, rampStop);
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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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if (argc > 1) {
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const char *arg = argv[1];
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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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}
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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(200, 200);
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return run(argc, argv, init, reshape,
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draw, 0);
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}
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