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-rw-r--r--src/hw/display/vga-helpers.h439
1 files changed, 439 insertions, 0 deletions
diff --git a/src/hw/display/vga-helpers.h b/src/hw/display/vga-helpers.h
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+++ b/src/hw/display/vga-helpers.h
@@ -0,0 +1,439 @@
+/*
+ * QEMU VGA Emulator templates
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+static inline void vga_draw_glyph_line(uint8_t *d, uint32_t font_data,
+ uint32_t xorcol, uint32_t bgcol)
+{
+ ((uint32_t *)d)[0] = (-((font_data >> 7)) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[1] = (-((font_data >> 6) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[2] = (-((font_data >> 5) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[3] = (-((font_data >> 4) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[4] = (-((font_data >> 3) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[5] = (-((font_data >> 2) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[6] = (-((font_data >> 1) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[7] = (-((font_data >> 0) & 1) & xorcol) ^ bgcol;
+}
+
+static void vga_draw_glyph8(uint8_t *d, int linesize,
+ const uint8_t *font_ptr, int h,
+ uint32_t fgcol, uint32_t bgcol)
+{
+ uint32_t font_data, xorcol;
+
+ xorcol = bgcol ^ fgcol;
+ do {
+ font_data = font_ptr[0];
+ vga_draw_glyph_line(d, font_data, xorcol, bgcol);
+ font_ptr += 4;
+ d += linesize;
+ } while (--h);
+}
+
+static void vga_draw_glyph16(uint8_t *d, int linesize,
+ const uint8_t *font_ptr, int h,
+ uint32_t fgcol, uint32_t bgcol)
+{
+ uint32_t font_data, xorcol;
+
+ xorcol = bgcol ^ fgcol;
+ do {
+ font_data = font_ptr[0];
+ vga_draw_glyph_line(d, expand4to8[font_data >> 4],
+ xorcol, bgcol);
+ vga_draw_glyph_line(d + 32, expand4to8[font_data & 0x0f],
+ xorcol, bgcol);
+ font_ptr += 4;
+ d += linesize;
+ } while (--h);
+}
+
+static void vga_draw_glyph9(uint8_t *d, int linesize,
+ const uint8_t *font_ptr, int h,
+ uint32_t fgcol, uint32_t bgcol, int dup9)
+{
+ uint32_t font_data, xorcol, v;
+
+ xorcol = bgcol ^ fgcol;
+ do {
+ font_data = font_ptr[0];
+ ((uint32_t *)d)[0] = (-((font_data >> 7)) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[1] = (-((font_data >> 6) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[2] = (-((font_data >> 5) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[3] = (-((font_data >> 4) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[4] = (-((font_data >> 3) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[5] = (-((font_data >> 2) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[6] = (-((font_data >> 1) & 1) & xorcol) ^ bgcol;
+ v = (-((font_data >> 0) & 1) & xorcol) ^ bgcol;
+ ((uint32_t *)d)[7] = v;
+ if (dup9)
+ ((uint32_t *)d)[8] = v;
+ else
+ ((uint32_t *)d)[8] = bgcol;
+ font_ptr += 4;
+ d += linesize;
+ } while (--h);
+}
+
+/*
+ * 4 color mode
+ */
+static void vga_draw_line2(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ uint32_t plane_mask, *palette, data, v;
+ int x;
+
+ palette = s1->last_palette;
+ plane_mask = mask16[s1->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ width >>= 3;
+ for(x = 0; x < width; x++) {
+ data = ((uint32_t *)s)[0];
+ data &= plane_mask;
+ v = expand2[GET_PLANE(data, 0)];
+ v |= expand2[GET_PLANE(data, 2)] << 2;
+ ((uint32_t *)d)[0] = palette[v >> 12];
+ ((uint32_t *)d)[1] = palette[(v >> 8) & 0xf];
+ ((uint32_t *)d)[2] = palette[(v >> 4) & 0xf];
+ ((uint32_t *)d)[3] = palette[(v >> 0) & 0xf];
+
+ v = expand2[GET_PLANE(data, 1)];
+ v |= expand2[GET_PLANE(data, 3)] << 2;
+ ((uint32_t *)d)[4] = palette[v >> 12];
+ ((uint32_t *)d)[5] = palette[(v >> 8) & 0xf];
+ ((uint32_t *)d)[6] = palette[(v >> 4) & 0xf];
+ ((uint32_t *)d)[7] = palette[(v >> 0) & 0xf];
+ d += 32;
+ s += 4;
+ }
+}
+
+#define PUT_PIXEL2(d, n, v) \
+((uint32_t *)d)[2*(n)] = ((uint32_t *)d)[2*(n)+1] = (v)
+
+/*
+ * 4 color mode, dup2 horizontal
+ */
+static void vga_draw_line2d2(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ uint32_t plane_mask, *palette, data, v;
+ int x;
+
+ palette = s1->last_palette;
+ plane_mask = mask16[s1->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ width >>= 3;
+ for(x = 0; x < width; x++) {
+ data = ((uint32_t *)s)[0];
+ data &= plane_mask;
+ v = expand2[GET_PLANE(data, 0)];
+ v |= expand2[GET_PLANE(data, 2)] << 2;
+ PUT_PIXEL2(d, 0, palette[v >> 12]);
+ PUT_PIXEL2(d, 1, palette[(v >> 8) & 0xf]);
+ PUT_PIXEL2(d, 2, palette[(v >> 4) & 0xf]);
+ PUT_PIXEL2(d, 3, palette[(v >> 0) & 0xf]);
+
+ v = expand2[GET_PLANE(data, 1)];
+ v |= expand2[GET_PLANE(data, 3)] << 2;
+ PUT_PIXEL2(d, 4, palette[v >> 12]);
+ PUT_PIXEL2(d, 5, palette[(v >> 8) & 0xf]);
+ PUT_PIXEL2(d, 6, palette[(v >> 4) & 0xf]);
+ PUT_PIXEL2(d, 7, palette[(v >> 0) & 0xf]);
+ d += 64;
+ s += 4;
+ }
+}
+
+/*
+ * 16 color mode
+ */
+static void vga_draw_line4(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ uint32_t plane_mask, data, v, *palette;
+ int x;
+
+ palette = s1->last_palette;
+ plane_mask = mask16[s1->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ width >>= 3;
+ for(x = 0; x < width; x++) {
+ data = ((uint32_t *)s)[0];
+ data &= plane_mask;
+ v = expand4[GET_PLANE(data, 0)];
+ v |= expand4[GET_PLANE(data, 1)] << 1;
+ v |= expand4[GET_PLANE(data, 2)] << 2;
+ v |= expand4[GET_PLANE(data, 3)] << 3;
+ ((uint32_t *)d)[0] = palette[v >> 28];
+ ((uint32_t *)d)[1] = palette[(v >> 24) & 0xf];
+ ((uint32_t *)d)[2] = palette[(v >> 20) & 0xf];
+ ((uint32_t *)d)[3] = palette[(v >> 16) & 0xf];
+ ((uint32_t *)d)[4] = palette[(v >> 12) & 0xf];
+ ((uint32_t *)d)[5] = palette[(v >> 8) & 0xf];
+ ((uint32_t *)d)[6] = palette[(v >> 4) & 0xf];
+ ((uint32_t *)d)[7] = palette[(v >> 0) & 0xf];
+ d += 32;
+ s += 4;
+ }
+}
+
+/*
+ * 16 color mode, dup2 horizontal
+ */
+static void vga_draw_line4d2(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ uint32_t plane_mask, data, v, *palette;
+ int x;
+
+ palette = s1->last_palette;
+ plane_mask = mask16[s1->ar[VGA_ATC_PLANE_ENABLE] & 0xf];
+ width >>= 3;
+ for(x = 0; x < width; x++) {
+ data = ((uint32_t *)s)[0];
+ data &= plane_mask;
+ v = expand4[GET_PLANE(data, 0)];
+ v |= expand4[GET_PLANE(data, 1)] << 1;
+ v |= expand4[GET_PLANE(data, 2)] << 2;
+ v |= expand4[GET_PLANE(data, 3)] << 3;
+ PUT_PIXEL2(d, 0, palette[v >> 28]);
+ PUT_PIXEL2(d, 1, palette[(v >> 24) & 0xf]);
+ PUT_PIXEL2(d, 2, palette[(v >> 20) & 0xf]);
+ PUT_PIXEL2(d, 3, palette[(v >> 16) & 0xf]);
+ PUT_PIXEL2(d, 4, palette[(v >> 12) & 0xf]);
+ PUT_PIXEL2(d, 5, palette[(v >> 8) & 0xf]);
+ PUT_PIXEL2(d, 6, palette[(v >> 4) & 0xf]);
+ PUT_PIXEL2(d, 7, palette[(v >> 0) & 0xf]);
+ d += 64;
+ s += 4;
+ }
+}
+
+/*
+ * 256 color mode, double pixels
+ *
+ * XXX: add plane_mask support (never used in standard VGA modes)
+ */
+static void vga_draw_line8d2(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ uint32_t *palette;
+ int x;
+
+ palette = s1->last_palette;
+ width >>= 3;
+ for(x = 0; x < width; x++) {
+ PUT_PIXEL2(d, 0, palette[s[0]]);
+ PUT_PIXEL2(d, 1, palette[s[1]]);
+ PUT_PIXEL2(d, 2, palette[s[2]]);
+ PUT_PIXEL2(d, 3, palette[s[3]]);
+ d += 32;
+ s += 4;
+ }
+}
+
+/*
+ * standard 256 color mode
+ *
+ * XXX: add plane_mask support (never used in standard VGA modes)
+ */
+static void vga_draw_line8(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ uint32_t *palette;
+ int x;
+
+ palette = s1->last_palette;
+ width >>= 3;
+ for(x = 0; x < width; x++) {
+ ((uint32_t *)d)[0] = palette[s[0]];
+ ((uint32_t *)d)[1] = palette[s[1]];
+ ((uint32_t *)d)[2] = palette[s[2]];
+ ((uint32_t *)d)[3] = palette[s[3]];
+ ((uint32_t *)d)[4] = palette[s[4]];
+ ((uint32_t *)d)[5] = palette[s[5]];
+ ((uint32_t *)d)[6] = palette[s[6]];
+ ((uint32_t *)d)[7] = palette[s[7]];
+ d += 32;
+ s += 8;
+ }
+}
+
+/*
+ * 15 bit color
+ */
+static void vga_draw_line15_le(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ int w;
+ uint32_t v, r, g, b;
+
+ w = width;
+ do {
+ v = lduw_le_p((void *)s);
+ r = (v >> 7) & 0xf8;
+ g = (v >> 2) & 0xf8;
+ b = (v << 3) & 0xf8;
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 2;
+ d += 4;
+ } while (--w != 0);
+}
+
+static void vga_draw_line15_be(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ int w;
+ uint32_t v, r, g, b;
+
+ w = width;
+ do {
+ v = lduw_be_p((void *)s);
+ r = (v >> 7) & 0xf8;
+ g = (v >> 2) & 0xf8;
+ b = (v << 3) & 0xf8;
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 2;
+ d += 4;
+ } while (--w != 0);
+}
+
+/*
+ * 16 bit color
+ */
+static void vga_draw_line16_le(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ int w;
+ uint32_t v, r, g, b;
+
+ w = width;
+ do {
+ v = lduw_le_p((void *)s);
+ r = (v >> 8) & 0xf8;
+ g = (v >> 3) & 0xfc;
+ b = (v << 3) & 0xf8;
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 2;
+ d += 4;
+ } while (--w != 0);
+}
+
+static void vga_draw_line16_be(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ int w;
+ uint32_t v, r, g, b;
+
+ w = width;
+ do {
+ v = lduw_be_p((void *)s);
+ r = (v >> 8) & 0xf8;
+ g = (v >> 3) & 0xfc;
+ b = (v << 3) & 0xf8;
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 2;
+ d += 4;
+ } while (--w != 0);
+}
+
+/*
+ * 24 bit color
+ */
+static void vga_draw_line24_le(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ int w;
+ uint32_t r, g, b;
+
+ w = width;
+ do {
+ b = s[0];
+ g = s[1];
+ r = s[2];
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 3;
+ d += 4;
+ } while (--w != 0);
+}
+
+static void vga_draw_line24_be(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+ int w;
+ uint32_t r, g, b;
+
+ w = width;
+ do {
+ r = s[0];
+ g = s[1];
+ b = s[2];
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 3;
+ d += 4;
+ } while (--w != 0);
+}
+
+/*
+ * 32 bit color
+ */
+static void vga_draw_line32_le(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+#ifndef HOST_WORDS_BIGENDIAN
+ memcpy(d, s, width * 4);
+#else
+ int w;
+ uint32_t r, g, b;
+
+ w = width;
+ do {
+ b = s[0];
+ g = s[1];
+ r = s[2];
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 4;
+ d += 4;
+ } while (--w != 0);
+#endif
+}
+
+static void vga_draw_line32_be(VGACommonState *s1, uint8_t *d,
+ const uint8_t *s, int width)
+{
+#ifdef HOST_WORDS_BIGENDIAN
+ memcpy(d, s, width * 4);
+#else
+ int w;
+ uint32_t r, g, b;
+
+ w = width;
+ do {
+ r = s[1];
+ g = s[2];
+ b = s[3];
+ ((uint32_t *)d)[0] = rgb_to_pixel32(r, g, b);
+ s += 4;
+ d += 4;
+ } while (--w != 0);
+#endif
+}
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