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DOS: fix image scaling and colors for 16-bit core video

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This commit is contained in:
Brad Parker 2017-01-30 13:51:34 -05:00
parent 22dfa1ca7c
commit 2661d5556b
1 changed files with 3 additions and 3 deletions
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6
gfx/drivers/vga_gfx.c
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@ -222,11 +222,11 @@ static bool vga_gfx_frame(void *data, const void *frame,
for (x = 0; x < VGA_WIDTH; x++)
{
/* scale incoming frame to fit the screen */
unsigned scaled_x = (width / VGA_WIDTH) * x;
unsigned scaled_y = (height / VGA_HEIGHT) * y;
unsigned scaled_x = (width / (float)VGA_WIDTH) * x;
unsigned scaled_y = (height / (float)VGA_HEIGHT) * y;
unsigned short pixel = ((unsigned short*)frame_to_copy)[width * scaled_y + scaled_x];
/* convert RGB565 to RGB332 */
/* convert RGB565 to BGR332 */
unsigned r = (7.0f / 31.0f) * ((pixel & 0xF800) >> 11);
unsigned g = (7.0f / 63.0f) * ((pixel & 0x07E0) >> 5);
unsigned b = (3.0f / 31.0f) * ((pixel & 0x001F) >> 0);