aboutsummaryrefslogtreecommitdiff
path: root/hw/display/vga-helpers.h
diff options
context:
space:
mode:
Diffstat (limited to 'hw/display/vga-helpers.h')
-rw-r--r--hw/display/vga-helpers.h100
1 files changed, 72 insertions, 28 deletions
diff --git a/hw/display/vga-helpers.h b/hw/display/vga-helpers.h
index 83b9a15..2993356 100644
--- a/hw/display/vga-helpers.h
+++ b/hw/display/vga-helpers.h
@@ -98,14 +98,19 @@ static void vga_draw_glyph9(uint8_t *d, int linesize,
/*
* 4 color mode
*/
-static void vga_draw_line2(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line2(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
uint32_t plane_mask, *palette, data, v;
int x;
palette = vga->last_palette;
plane_mask = mask16[vga->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ hpel &= 7;
+ if (hpel) {
+ width += 8;
+ d = vga->panning_buf;
+ }
width >>= 3;
for(x = 0; x < width; x++) {
data = vga_read_dword_le(vga, addr & (VGA_VRAM_SIZE - 1));
@@ -126,6 +131,7 @@ static void vga_draw_line2(VGACommonState *vga, uint8_t *d,
d += 32;
addr += 4;
}
+ return hpel ? vga->panning_buf + 4 * hpel : NULL;
}
#define PUT_PIXEL2(d, n, v) \
@@ -134,14 +140,19 @@ static void vga_draw_line2(VGACommonState *vga, uint8_t *d,
/*
* 4 color mode, dup2 horizontal
*/
-static void vga_draw_line2d2(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line2d2(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
uint32_t plane_mask, *palette, data, v;
int x;
palette = vga->last_palette;
plane_mask = mask16[vga->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ hpel &= 7;
+ if (hpel) {
+ width += 8;
+ d = vga->panning_buf;
+ }
width >>= 3;
for(x = 0; x < width; x++) {
data = vga_read_dword_le(vga, addr & (VGA_VRAM_SIZE - 1));
@@ -162,19 +173,25 @@ static void vga_draw_line2d2(VGACommonState *vga, uint8_t *d,
d += 64;
addr += 4;
}
+ return hpel ? vga->panning_buf + 8 * hpel : NULL;
}
/*
* 16 color mode
*/
-static void vga_draw_line4(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line4(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
uint32_t plane_mask, data, v, *palette;
int x;
palette = vga->last_palette;
plane_mask = mask16[vga->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ hpel &= 7;
+ if (hpel) {
+ width += 8;
+ d = vga->panning_buf;
+ }
width >>= 3;
for(x = 0; x < width; x++) {
data = vga_read_dword_le(vga, addr & (VGA_VRAM_SIZE - 1));
@@ -194,19 +211,25 @@ static void vga_draw_line4(VGACommonState *vga, uint8_t *d,
d += 32;
addr += 4;
}
+ return hpel ? vga->panning_buf + 4 * hpel : NULL;
}
/*
* 16 color mode, dup2 horizontal
*/
-static void vga_draw_line4d2(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line4d2(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
uint32_t plane_mask, data, v, *palette;
int x;
palette = vga->last_palette;
plane_mask = mask16[vga->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ hpel &= 7;
+ if (hpel) {
+ width += 8;
+ d = vga->panning_buf;
+ }
width >>= 3;
for(x = 0; x < width; x++) {
data = vga_read_dword_le(vga, addr & (VGA_VRAM_SIZE - 1));
@@ -226,6 +249,7 @@ static void vga_draw_line4d2(VGACommonState *vga, uint8_t *d,
d += 64;
addr += 4;
}
+ return hpel ? vga->panning_buf + 8 * hpel : NULL;
}
/*
@@ -233,13 +257,18 @@ static void vga_draw_line4d2(VGACommonState *vga, uint8_t *d,
*
* XXX: add plane_mask support (never used in standard VGA modes)
*/
-static void vga_draw_line8d2(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line8d2(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
uint32_t *palette;
int x;
palette = vga->last_palette;
+ hpel = (hpel >> 1) & 3;
+ if (hpel) {
+ width += 8;
+ d = vga->panning_buf;
+ }
width >>= 3;
for(x = 0; x < width; x++) {
addr &= VGA_VRAM_SIZE - 1;
@@ -250,6 +279,7 @@ static void vga_draw_line8d2(VGACommonState *vga, uint8_t *d,
d += 32;
addr += 4;
}
+ return hpel ? vga->panning_buf + 8 * hpel : NULL;
}
/*
@@ -257,13 +287,18 @@ static void vga_draw_line8d2(VGACommonState *vga, uint8_t *d,
*
* XXX: add plane_mask support (never used in standard VGA modes)
*/
-static void vga_draw_line8(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line8(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
uint32_t *palette;
int x;
palette = vga->last_palette;
+ hpel = (hpel >> 1) & 3;
+ if (hpel) {
+ width += 8;
+ d = vga->panning_buf;
+ }
width >>= 3;
for(x = 0; x < width; x++) {
((uint32_t *)d)[0] = palette[vga_read_byte(vga, addr + 0)];
@@ -277,13 +312,14 @@ static void vga_draw_line8(VGACommonState *vga, uint8_t *d,
d += 32;
addr += 8;
}
+ return hpel ? vga->panning_buf + 4 * hpel : NULL;
}
/*
* 15 bit color
*/
-static void vga_draw_line15_le(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line15_le(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t v, r, g, b;
@@ -298,10 +334,11 @@ static void vga_draw_line15_le(VGACommonState *vga, uint8_t *d,
addr += 2;
d += 4;
} while (--w != 0);
+ return NULL;
}
-static void vga_draw_line15_be(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line15_be(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t v, r, g, b;
@@ -316,13 +353,14 @@ static void vga_draw_line15_be(VGACommonState *vga, uint8_t *d,
addr += 2;
d += 4;
} while (--w != 0);
+ return NULL;
}
/*
* 16 bit color
*/
-static void vga_draw_line16_le(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line16_le(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t v, r, g, b;
@@ -337,10 +375,11 @@ static void vga_draw_line16_le(VGACommonState *vga, uint8_t *d,
addr += 2;
d += 4;
} while (--w != 0);
+ return NULL;
}
-static void vga_draw_line16_be(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line16_be(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t v, r, g, b;
@@ -355,13 +394,14 @@ static void vga_draw_line16_be(VGACommonState *vga, uint8_t *d,
addr += 2;
d += 4;
} while (--w != 0);
+ return NULL;
}
/*
* 24 bit color
*/
-static void vga_draw_line24_le(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line24_le(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t r, g, b;
@@ -375,10 +415,11 @@ static void vga_draw_line24_le(VGACommonState *vga, uint8_t *d,
addr += 3;
d += 4;
} while (--w != 0);
+ return NULL;
}
-static void vga_draw_line24_be(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line24_be(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t r, g, b;
@@ -392,13 +433,14 @@ static void vga_draw_line24_be(VGACommonState *vga, uint8_t *d,
addr += 3;
d += 4;
} while (--w != 0);
+ return NULL;
}
/*
* 32 bit color
*/
-static void vga_draw_line32_le(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line32_le(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t r, g, b;
@@ -412,10 +454,11 @@ static void vga_draw_line32_le(VGACommonState *vga, uint8_t *d,
addr += 4;
d += 4;
} while (--w != 0);
+ return NULL;
}
-static void vga_draw_line32_be(VGACommonState *vga, uint8_t *d,
- uint32_t addr, int width)
+static void *vga_draw_line32_be(VGACommonState *vga, uint8_t *d,
+ uint32_t addr, int width, int hpel)
{
int w;
uint32_t r, g, b;
@@ -429,4 +472,5 @@ static void vga_draw_line32_be(VGACommonState *vga, uint8_t *d,
addr += 4;
d += 4;
} while (--w != 0);
+ return NULL;
}
generated by cgit v1.1 at 2025-04-12 19:42:02 +0000