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author | Andreas Baumann <mail@andreasbaumann.cc> | 2017-06-30 15:02:26 +0200 |
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committer | Andreas Baumann <mail@andreasbaumann.cc> | 2017-06-30 15:02:26 +0200 |
commit | 915dd4b023d0826166d4887100dbed64d46821a9 (patch) | |
tree | 7803f23f045e3bf9cb70c7430be3b304212f660f /src/drivers/video/vga.c | |
parent | d2af238397ab523b2c1ba7d24875a186b4a8acc6 (diff) | |
download | abaos-915dd4b023d0826166d4887100dbed64d46821a9.tar.gz abaos-915dd4b023d0826166d4887100dbed64d46821a9.tar.bz2 |
playing with Z buffering in VGA driver
Diffstat (limited to 'src/drivers/video/vga.c')
-rw-r--r-- | src/drivers/video/vga.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/src/drivers/video/vga.c b/src/drivers/video/vga.c index 9d540af..bcd4366 100644 --- a/src/drivers/video/vga.c +++ b/src/drivers/video/vga.c @@ -253,7 +253,7 @@ bool vga_set_mode( vga_t *vga, const vga_mode_t mode ) vga->mode = mode; vga->mode.segment = get_frame_buffer_segment( vga ); - vga->use_z_buffer = false; + vga_use_z_buffer( vga, false ); return true; } @@ -317,7 +317,7 @@ void vga_set_pixel( vga_t *vga, const int x, const int y, const vga_color_t colo uint8_t color_idx = get_color_index( color ); - uint8_t *addr = vga->mode.segment + vga->mode.x * y + x; + uint8_t *addr = vga->base_addr + vga->mode.x * y + x; *addr = color_idx; } @@ -337,14 +337,14 @@ void vga_draw_rectangle( vga_t *vga, const int x, const int y, const int w, cons uint8_t color_idx = get_color_index( color ); for( int yy = y; yy < y + h; yy++ ) { - uint8_t *addr = vga->mode.segment + vga->mode.x * yy + x; + uint8_t *addr = vga->base_addr + vga->mode.x * yy + x; memset( addr, color_idx, w ); } } void vga_clear_screen( vga_t *vga, const vga_color_t color ) { - memset( vga->mode.segment, get_color_index( color ), + memset( vga->base_addr, get_color_index( color ), vga->mode.x * vga->mode.y ); } @@ -385,6 +385,19 @@ void vga_wait_for_retrace( vga_t *vga ) void vga_use_z_buffer( vga_t *vga, bool use ) { vga->use_z_buffer = use; + + if( vga->use_z_buffer ) { + vga->base_addr = &vga->zbuffer[0]; + } else { + vga->base_addr = vga->mode.segment; + } } +void vga_refresh( vga_t *vga ) +{ + if( vga->use_z_buffer ) { + vga_wait_for_retrace( vga ); + memcpy( vga->mode.segment, vga->zbuffer, 65535 ); + } +} |