drummyfish/Licar
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Draw sky strip

Browse source
This commit is contained in:
Miloslav Ciz 2023-09-13 20:51:07 +02:00
parent d7194d9183
commit 6e068eff2b
2 changed files with 97 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

78
renderer.h Normal file
View file

@ -0,0 +1,78 @@
#ifndef _LCR_RENDERER_H
#define _LCR_RENDERER_H
struct LCR_Renderer
{
// TODO
};
void LCR_drawBackground(int verticalOffset)
{
uint16_t color = LCR_skyImages[LCR_skyImages[256] & 0x00ff] ; // TODO
int limit = verticalOffset - LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE / 2;
if (limit >= LCR_EFFECTIVE_RESOLUTION_Y)
limit = LCR_EFFECTIVE_RESOLUTION_Y - 1;
for (int y = 0; y <= limit; ++y)
for (int x = 0; x < LCR_EFFECTIVE_RESOLUTION_X; ++x)
LCR_drawPixelUnsafe(x,y,color);
color = LCR_skyImages[LCR_skyImages[255 + (128 * 128) / 2] >> 8]; // TODO
limit = verticalOffset + LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE / 2 -
LCR_SETTING_SKY_SIZE;
if (limit < 0)
limit = 0;
for (int y = LCR_EFFECTIVE_RESOLUTION_Y - 1; y >= limit; --y)
for (int x = 0; x < LCR_EFFECTIVE_RESOLUTION_X; ++x)
LCR_drawPixelUnsafe(x,y,color);
}
void LCR_drawSkyStrip(int verticalOffset, uint8_t horizontalOffset)
{
#if LCR_SETTING_SKY_SIZE != 0
verticalOffset -= (LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE) / 2;
int finalY = verticalOffset + LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE;
finalY = (finalY / LCR_SETTING_SKY_SIZE) * LCR_SETTING_SKY_SIZE;
if (finalY >= LCR_EFFECTIVE_RESOLUTION_Y)
finalY = LCR_EFFECTIVE_RESOLUTION_Y - 1;
const uint16_t *skyLine = LCR_skyImages + 256;
if (verticalOffset < 0)
{
skyLine += (-1 * verticalOffset / LCR_SETTING_SKY_SIZE) * (LCR_SKY_IMAGE_SIZE / 2);
verticalOffset = 0;
}
while (verticalOffset < finalY)
{
for (int i = 0; i < LCR_EFFECTIVE_RESOLUTION_X; ++i)
{
// TODO: check z-buffer
int offsetX = (i / LCR_SETTING_SKY_SIZE + horizontalOffset)
% LCR_SKY_IMAGE_SIZE;
uint16_t pixel = *(skyLine + offsetX / 2);
pixel = offsetX % 2 ? (pixel >> 8) : (pixel & 0x00ff);
LCR_drawPixelUnsafe(i,verticalOffset,LCR_skyImages[pixel]);
}
verticalOffset++;
if (verticalOffset % LCR_SETTING_SKY_SIZE == 0)
skyLine += LCR_SKY_IMAGE_SIZE / 2;
}
#endif
}
#endif // guard