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Add test texture

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This commit is contained in:
Miloslav Číž 2019-04-28 21:11:23 +02:00
parent c0a0270c96
commit db06869dd7
1 changed files with 41 additions and 1 deletions
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42
testSDL.c
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@ -14,6 +14,26 @@
#define SCREEN_WIDTH 640 #define SCREEN_WIDTH 640
#define SCREEN_HEIGHT 480 #define SCREEN_HEIGHT 480
const uint8_t testTexture[] =
{
2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2,
2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,
0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
2,0,0,0,0,1,1,1,1,1,0,0,0,0,0,2,
2,0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,
2,0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,
2,0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,
0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,
0,0,2,2,0,0,0,0,0,0,0,0,1,1,0,0,
2,0,2,2,0,0,0,0,0,0,0,0,1,1,0,2,
2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2
};
uint32_t pixels[SCREEN_WIDTH * SCREEN_HEIGHT]; uint32_t pixels[SCREEN_WIDTH * SCREEN_HEIGHT];
uint32_t frame = 0; uint32_t frame = 0;
@ -37,12 +57,32 @@ static inline void setPixel(int x, int y, uint8_t red, uint8_t green, uint8_t bl
pixels[y * SCREEN_WIDTH + x] = r | g | b; pixels[y * SCREEN_WIDTH + x] = r | g | b;
} }
uint8_t texturePixel(int32_t u, int32_t v)
{
u %= 16;
v %= 16;
return testTexture[v * 16 + u];
}
void drawPixel(S3L_PixelInfo *p) void drawPixel(S3L_PixelInfo *p)
{ {
setPixel(p->x,p->y, float b0 = p->barycentric0 / ((float) S3L_FRACTIONS_PER_UNIT);
float b1 = p->barycentric1 / ((float) S3L_FRACTIONS_PER_UNIT);
float b2 = p->barycentric2 / ((float) S3L_FRACTIONS_PER_UNIT);
int32_t u = b0 * 0 + b1 * 0 + b2 * 16;
int32_t v = b0 * 0 + b1 * 16 + b2 * 16;
uint8_t col = texturePixel(u,v);
setPixel(p->x,p->y,col * 120,20,(2 - col) * 120);
/* setPixel(p->x,p->y,
p->barycentric0 / ((float) S3L_FRACTIONS_PER_UNIT) * 255, p->barycentric0 / ((float) S3L_FRACTIONS_PER_UNIT) * 255,
p->barycentric1 / ((float) S3L_FRACTIONS_PER_UNIT) * 255, p->barycentric1 / ((float) S3L_FRACTIONS_PER_UNIT) * 255,
p->barycentric2 / ((float) S3L_FRACTIONS_PER_UNIT) * 255); p->barycentric2 / ((float) S3L_FRACTIONS_PER_UNIT) * 255);
*/
} }
const int16_t test_coords[] = const int16_t test_coords[] =