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TARGET = texture-flip.elf | ||
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include ../../common-test.mk |
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#include <common.h> | ||
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#define SCR_W 320 | ||
#define SCR_H 240 | ||
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const int texPageX = 640; | ||
const int texPageY = 0; | ||
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uint16_t lastTpage = 0; | ||
void setTextureFlip(bool flipY, bool flipX) { | ||
DR_TPAGE e; | ||
setDrawTPage(&e, /* Drawing to display area */ 1, /* dithering */ 0, getTPage(/* bits = 15bit */ 2, /* transparencyMode */0, texPageX, texPageY)); | ||
e.code[0] |= (flipX << 12); | ||
e.code[0] |= (flipY << 13); | ||
lastTpage = e.code[0]; | ||
DrawPrim(&e); | ||
} | ||
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void drawRectangle(int x, int y, int w, int h) { | ||
SPRT s; | ||
setSprt(&s); | ||
setSemiTrans(&s, 0); | ||
setRGB0(&s, 128, 128, 128 ); | ||
s.x0 = x; | ||
s.y0 = y; | ||
s.w = w; | ||
s.h = h; | ||
s.u0 = 0; | ||
s.v0 = 0; | ||
DrawPrim(&s); | ||
} | ||
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void drawQuad(int x, int y, int w, int h) { | ||
POLY_FT4 p; | ||
setPolyFT4(&p); | ||
setSemiTrans(&p, 0); | ||
setRGB0(&p, 128, 128, 128 ); | ||
setClut(&p, 0, 0); // Not used | ||
p.tpage = lastTpage; | ||
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p.x0 = x; p.y0 = y; | ||
p.x1 = x+w; p.y1 = y; | ||
p.x2 = x; p.y2 = y+h; | ||
p.x3 = x+w; p.y3 = y+h; | ||
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p.u0 = 0; p.v0 = 0; | ||
p.u1 = w; p.v1 = 0; | ||
p.u2 = 0; p.v2 = h; | ||
p.u3 = w; p.v3 = h; | ||
DrawPrim(&p); | ||
} | ||
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int main() { | ||
initVideo(SCR_W, SCR_H); | ||
printf("\ngpu/texture-flip\n"); | ||
printf("VRAM contents:\n" | ||
"0,0 \n" | ||
"┌--------------------------------------------------------┐\n" | ||
"|┌--------┐ ┌--------┐ ┌---------┐ |\n" | ||
"|| | | | | | |\n" | ||
"|| Rect | | Rect | | texture | |\n" | ||
"|| normal | | x-flip | | | |\n" | ||
"|| | | | | | |\n" | ||
"|| | | | | | |\n" | ||
"│└--------┘ └--------┘ └---------┘ |\n" | ||
"| |\n" | ||
"│┌--------┐ ┌--------┐ ┌--┐ ┌--┐ |\n" | ||
"|| | | | | r| | r| 64x64rect |\n" | ||
"|| Rect | | Rect | └--┘ └--┘ 2nd flipped |\n" | ||
"|| y-flip | | x&y | |\n" | ||
"|| | | flip | ┌--┐ ┌--┐ 64x64 quad |\n" | ||
"|| | | | | q| | q| 2nd flipped |\n" | ||
"|└--------┘ └--------┘ └--┘ └--┘(should be the same)|\n" | ||
"└--------------------------------------------------------┘\n" | ||
" 1023, 1023\n\n"); | ||
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clearScreenColor(0xff, 0xff, 0xff); | ||
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const int W = 256; | ||
const int H = 256; | ||
// Make texture | ||
for (int i = 0; i < 0xffff; i++) { | ||
int x = texPageX + i % W; | ||
int y = texPageY + i / W; | ||
vramPut(x, y, i); | ||
} | ||
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// 0x0 - normal | ||
setTextureFlip(0, 0); | ||
drawRectangle(0, 0, W, H); | ||
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// 260x0 - x flipped | ||
setTextureFlip(0, 1); | ||
drawRectangle(260, 0, W, H); | ||
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// 260x0 - y flipped | ||
setTextureFlip(1, 0); | ||
drawRectangle(0, 260, W, H); | ||
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// 260x260 - x&&y flipped | ||
setTextureFlip(1, 1); | ||
drawRectangle(260, 260, W, H); | ||
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// 640x260 - normal (small rect) | ||
setTextureFlip(0, 0); | ||
drawRectangle(640, 260, 64, 64); | ||
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// 640x260 - x&&y flipped (small rect) | ||
setTextureFlip(1, 1); | ||
drawRectangle(714, 260, 64, 64); | ||
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// Check polygons as well, just to be sure | ||
// 640x260 - normal (small polygon) | ||
setTextureFlip(0, 0); | ||
drawQuad(640, 334, 64, 64); | ||
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// 640x260 - x&&y flipped (small polygon) | ||
setTextureFlip(1, 1); | ||
drawQuad(714, 334, 64, 64); | ||
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printf("Done.\n"); | ||
for (;;) { | ||
VSync(0); | ||
} | ||
return 0; | ||
} |
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