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https://github.com/kichikuou/xsystem35-sdl2.git
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100 lines
1.6 KiB
C
100 lines
1.6 KiB
C
// draw rectangle
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#include "portab.h"
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#include "surface.h"
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#include "ngraph.h"
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#include "ags.h"
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int gr_drawrect(surface_t *dst, int x, int y, int w, int h, int r, int g, int b) {
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BYTE *dp;
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int i;
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int col = 0;
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if (FALSE == gr_clip_xywh(dst, &x, &y, &w, &h)) {
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return NG;
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}
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dp = GETOFFSET_PIXEL(dst, x, y);
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switch(dst->depth) {
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case 8:
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col = r; break;
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case 15:
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col = PIX15(r, g, b); break;
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case 16:
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col = PIX16(r, g, b); break;
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case 24:
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case 32:
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col = PIX24(r, g, b); break;
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}
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switch(dst->depth) {
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case 8:
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/* top */
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for (i = 0; i < w; i++) {
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*((BYTE *)dp + i) = col;
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}
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/* side */
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h-=2;
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for (i = 0; i < h; i++) {
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dp += dst->bytes_per_line;
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*((BYTE *)dp) = col;
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*((BYTE *)dp + w - 1) = col;
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}
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/* bottom */
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dp += dst->bytes_per_line;
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for (i = 0; i < w; i++) {
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*((BYTE *)dp + i) = col;
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}
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break;
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case 15:
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case 16:
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/* top */
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for (i = 0; i < w; i++) {
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*((WORD *)dp + i) = col;
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}
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/* side */
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h-=2;
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for (i = 0; i < h; i++) {
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dp += dst->bytes_per_line;
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*((WORD *)dp) = col;
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*((WORD *)dp + w - 1) = col;
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}
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/* bottom */
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dp += dst->bytes_per_line;
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for (i = 0; i < w; i++) {
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*((WORD *)dp + i) = col;
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}
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break;
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case 24:
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case 32:
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/* top */
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for (i = 0; i < w; i++) {
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*((DWORD *)dp + i) = col;
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}
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/* side */
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h-=2;
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for (i = 0; i < h; i++) {
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dp += dst->bytes_per_line;
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*((DWORD *)dp) = col;
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*((DWORD *)dp + w - 1) = col;
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}
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/* bottom */
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dp += dst->bytes_per_line;
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for (i = 0; i < w; i++) {
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*((DWORD *)dp + i) = col;
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}
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break;
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}
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return OK;
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}
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