Hardware level VGA emulation (only text mode is tested)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@344 c046a42c-6fe2-441c-8c8c-71466251a162

hw/vga_template.h

+/*
+ * 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.
+ */
+
+#if DEPTH == 8
+#define BPP 1
+#define PIXEL_TYPE uint8_t 
+#elif DEPTH == 15 || DEPTH == 16
+#define BPP 2
+#define PIXEL_TYPE uint16_t 
+#elif DEPTH == 32
+#define BPP 4
+#define PIXEL_TYPE uint32_t 
+#else
+#error unsupport depth
+#endif
+
+#if DEPTH != 15
+
+static void glue(vga_draw_glyph8_, DEPTH)(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];
+#if BPP == 1
+        ((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[3] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
+#elif BPP == 2
+        ((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[3] = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
+#else
+        ((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;
+#endif
+        font_ptr += 4;
+        d += linesize;
+    } while (--h);
+}
+
+static void glue(vga_draw_glyph9_, DEPTH)(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];
+        /* XXX: unaligned accesses are done */
+#if BPP == 1
+        ((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
+        v = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[3] = v;
+        if (dup9)
+            *(uint8_t *)(d + 8) = v >> (24 * (1 - BIG));
+        else
+            *(uint8_t *)(d + 8) = bgcol;
+        
+#elif BPP == 2
+        ((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
+        v = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
+        ((uint32_t *)d)[3] = v;
+        if (dup9)
+            *(uint16_t *)(d + 8) = v >> (16 * (1 - BIG));
+        else
+            *(uint16_t *)(d + 8) = bgcol;
+#else
+        ((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;
+#endif
+        font_ptr += 4;
+        d += linesize;
+    } while (--h);
+}
+
+/* 
+ * 4 color mode
+ */
+static void glue(vga_draw_line2_, DEPTH)(VGAState *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[0x12] & 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;
+        ((PIXEL_TYPE *)d)[0] = palette[v >> 12];
+        ((PIXEL_TYPE *)d)[1] = palette[(v >> 8) & 0xf];
+        ((PIXEL_TYPE *)d)[2] = palette[(v >> 4) & 0xf];
+        ((PIXEL_TYPE *)d)[3] = palette[(v >> 0) & 0xf];
+
+        v = expand2[GET_PLANE(data, 1)];
+        v |= expand2[GET_PLANE(data, 3)] << 2;
+        ((PIXEL_TYPE *)d)[4] = palette[v >> 12];
+        ((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];
+        ((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];
+        ((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];
+        d += BPP * 8;
+        s += 4;
+    }
+}
+
+/* 
+ * 16 color mode
+ */
+static void glue(vga_draw_line4_, DEPTH)(VGAState *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[0x12] & 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;
+        ((PIXEL_TYPE *)d)[0] = palette[v >> 28];
+        ((PIXEL_TYPE *)d)[1] = palette[(v >> 24) & 0xf];
+        ((PIXEL_TYPE *)d)[2] = palette[(v >> 20) & 0xf];
+        ((PIXEL_TYPE *)d)[3] = palette[(v >> 16) & 0xf];
+        ((PIXEL_TYPE *)d)[4] = palette[(v >> 12) & 0xf];
+        ((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];
+        ((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];
+        ((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];
+        d += BPP * 8;
+        s += 4;
+    }
+}
+
+/* 
+ * 256 color mode
+ *
+ * XXX: add plane_mask support (never used in standard VGA modes)
+ */
+static void glue(vga_draw_line8_, DEPTH)(VGAState *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++) {
+        ((PIXEL_TYPE *)d)[0] = palette[s[0]];
+        ((PIXEL_TYPE *)d)[1] = palette[s[1]];
+        ((PIXEL_TYPE *)d)[2] = palette[s[2]];
+        ((PIXEL_TYPE *)d)[3] = palette[s[3]];
+        ((PIXEL_TYPE *)d)[4] = palette[s[4]];
+        ((PIXEL_TYPE *)d)[5] = palette[s[5]];
+        ((PIXEL_TYPE *)d)[6] = palette[s[6]];
+        ((PIXEL_TYPE *)d)[7] = palette[s[7]];
+        d += BPP * 8;
+        s += 8;
+    }
+}
+
+#endif /* DEPTH != 15 */
+
+
+/* XXX: optimize */
+
+/* 
+ * 15 bit color
+ */
+static void glue(vga_draw_line15_, DEPTH)(VGAState *s1, uint8_t *d, 
+                                          const uint8_t *s, int width)
+{
+#if DEPTH == 15 && !defined(WORDS_BIGENDIAN)
+    memcpy(d, s, width * 2);
+#else
+    int w;
+    uint32_t v, r, g, b;
+
+    w = width;
+    do {
+        v = lduw((void *)s);
+        r = (v >> 7) & 0xf8;
+        g = (v >> 2) & 0xf8;
+        b = (v << 3) & 0xf8;
+        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
+        s += 2;
+        d += BPP;
+    } while (--w != 0);
+#endif    
+}
+
+/* 
+ * 16 bit color
+ */
+static void glue(vga_draw_line16_, DEPTH)(VGAState *s1, uint8_t *d, 
+                                          const uint8_t *s, int width)
+{
+#if DEPTH == 16 && !defined(WORDS_BIGENDIAN)
+    memcpy(d, s, width * 2);
+#else
+    int w;
+    uint32_t v, r, g, b;
+
+    w = width;
+    do {
+        v = lduw((void *)s);
+        r = (v >> 8) & 0xf8;
+        g = (v >> 3) & 0xfc;
+        b = (v << 3) & 0xf8;
+        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
+        s += 2;
+        d += BPP;
+    } while (--w != 0);
+#endif    
+}
+
+/* 
+ * 32 bit color
+ */
+static void glue(vga_draw_line32_, DEPTH)(VGAState *s1, uint8_t *d, 
+                                          const uint8_t *s, int width)
+{
+#if DEPTH == 32 && !defined(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];
+        ((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
+        s += 4;
+        d += BPP;
+    } while (--w != 0);
+#endif
+}
+
+#undef DEPTH
+#undef BPP
+#undef PIXEL_TYPE