mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
8c78881f48
Compiling with GCC 4.6.0 20100925 produced a lot of warnings like:
In file included from /src/qemu/hw/cirrus_vga_rop.h:174:0,
from /src/qemu/hw/cirrus_vga.c:284:
/src/qemu/hw/cirrus_vga_rop2.h: In function 'cirrus_patternfill_0_8':
/src/qemu/hw/cirrus_vga_rop2.h:48:18: error: variable 'col' set but not used [-Werror=unused-but-set-variable]
/src/qemu/hw/cirrus_vga_rop2.h: In function 'cirrus_colorexpand_transp_0_8':
/src/qemu/hw/cirrus_vga_rop2.h:104:18: error: variable 'col' set but not used [-Werror=unused-but-set-variable]
Fix the warnings by introducing an inline function, which avoids
exposing write-only variables.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
281 lines
7.9 KiB
C
281 lines
7.9 KiB
C
/*
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* QEMU Cirrus CLGD 54xx VGA Emulator.
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*
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* Copyright (c) 2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#if DEPTH == 8
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#define PUTPIXEL() ROP_OP(&d[0], col)
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#elif DEPTH == 16
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#define PUTPIXEL() ROP_OP_16((uint16_t *)&d[0], col)
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#elif DEPTH == 24
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#define PUTPIXEL() ROP_OP(&d[0], col); \
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ROP_OP(&d[1], (col >> 8)); \
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ROP_OP(&d[2], (col >> 16))
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#elif DEPTH == 32
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#define PUTPIXEL() ROP_OP_32(((uint32_t *)&d[0]), col)
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#else
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#error unsupported DEPTH
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#endif
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static void
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glue(glue(glue(cirrus_patternfill_, ROP_NAME), _),DEPTH)
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(CirrusVGAState * s, uint8_t * dst,
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const uint8_t * src,
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int dstpitch, int srcpitch,
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int bltwidth, int bltheight)
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{
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uint8_t *d;
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int x, y, pattern_y, pattern_pitch, pattern_x;
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unsigned int col;
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const uint8_t *src1;
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#if DEPTH == 24
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int skipleft = s->vga.gr[0x2f] & 0x1f;
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#else
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int skipleft = (s->vga.gr[0x2f] & 0x07) * (DEPTH / 8);
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#endif
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#if DEPTH == 8
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pattern_pitch = 8;
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#elif DEPTH == 16
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pattern_pitch = 16;
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#else
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pattern_pitch = 32;
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#endif
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pattern_y = s->cirrus_blt_srcaddr & 7;
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for(y = 0; y < bltheight; y++) {
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pattern_x = skipleft;
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d = dst + skipleft;
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src1 = src + pattern_y * pattern_pitch;
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for (x = skipleft; x < bltwidth; x += (DEPTH / 8)) {
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#if DEPTH == 8
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col = src1[pattern_x];
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pattern_x = (pattern_x + 1) & 7;
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#elif DEPTH == 16
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col = ((uint16_t *)(src1 + pattern_x))[0];
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pattern_x = (pattern_x + 2) & 15;
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#elif DEPTH == 24
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{
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const uint8_t *src2 = src1 + pattern_x * 3;
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col = src2[0] | (src2[1] << 8) | (src2[2] << 16);
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pattern_x = (pattern_x + 1) & 7;
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}
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#else
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col = ((uint32_t *)(src1 + pattern_x))[0];
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pattern_x = (pattern_x + 4) & 31;
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#endif
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PUTPIXEL();
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d += (DEPTH / 8);
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}
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pattern_y = (pattern_y + 1) & 7;
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dst += dstpitch;
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}
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}
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/* NOTE: srcpitch is ignored */
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static void
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glue(glue(glue(cirrus_colorexpand_transp_, ROP_NAME), _),DEPTH)
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(CirrusVGAState * s, uint8_t * dst,
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const uint8_t * src,
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int dstpitch, int srcpitch,
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int bltwidth, int bltheight)
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{
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uint8_t *d;
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int x, y;
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unsigned bits, bits_xor;
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unsigned int col;
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unsigned bitmask;
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unsigned index;
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#if DEPTH == 24
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int dstskipleft = s->vga.gr[0x2f] & 0x1f;
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int srcskipleft = dstskipleft / 3;
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#else
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int srcskipleft = s->vga.gr[0x2f] & 0x07;
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int dstskipleft = srcskipleft * (DEPTH / 8);
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#endif
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if (s->cirrus_blt_modeext & CIRRUS_BLTMODEEXT_COLOREXPINV) {
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bits_xor = 0xff;
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col = s->cirrus_blt_bgcol;
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} else {
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bits_xor = 0x00;
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col = s->cirrus_blt_fgcol;
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}
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for(y = 0; y < bltheight; y++) {
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bitmask = 0x80 >> srcskipleft;
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bits = *src++ ^ bits_xor;
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d = dst + dstskipleft;
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for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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if ((bitmask & 0xff) == 0) {
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bitmask = 0x80;
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bits = *src++ ^ bits_xor;
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}
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index = (bits & bitmask);
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if (index) {
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PUTPIXEL();
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}
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d += (DEPTH / 8);
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bitmask >>= 1;
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}
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dst += dstpitch;
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}
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}
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static void
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glue(glue(glue(cirrus_colorexpand_, ROP_NAME), _),DEPTH)
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(CirrusVGAState * s, uint8_t * dst,
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const uint8_t * src,
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int dstpitch, int srcpitch,
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int bltwidth, int bltheight)
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{
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uint32_t colors[2];
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uint8_t *d;
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int x, y;
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unsigned bits;
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unsigned int col;
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unsigned bitmask;
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int srcskipleft = s->vga.gr[0x2f] & 0x07;
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int dstskipleft = srcskipleft * (DEPTH / 8);
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colors[0] = s->cirrus_blt_bgcol;
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colors[1] = s->cirrus_blt_fgcol;
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for(y = 0; y < bltheight; y++) {
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bitmask = 0x80 >> srcskipleft;
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bits = *src++;
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d = dst + dstskipleft;
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for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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if ((bitmask & 0xff) == 0) {
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bitmask = 0x80;
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bits = *src++;
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}
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col = colors[!!(bits & bitmask)];
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PUTPIXEL();
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d += (DEPTH / 8);
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bitmask >>= 1;
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}
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dst += dstpitch;
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}
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}
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static void
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glue(glue(glue(cirrus_colorexpand_pattern_transp_, ROP_NAME), _),DEPTH)
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(CirrusVGAState * s, uint8_t * dst,
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const uint8_t * src,
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int dstpitch, int srcpitch,
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int bltwidth, int bltheight)
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{
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uint8_t *d;
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int x, y, bitpos, pattern_y;
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unsigned int bits, bits_xor;
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unsigned int col;
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#if DEPTH == 24
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int dstskipleft = s->vga.gr[0x2f] & 0x1f;
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int srcskipleft = dstskipleft / 3;
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#else
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int srcskipleft = s->vga.gr[0x2f] & 0x07;
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int dstskipleft = srcskipleft * (DEPTH / 8);
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#endif
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if (s->cirrus_blt_modeext & CIRRUS_BLTMODEEXT_COLOREXPINV) {
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bits_xor = 0xff;
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col = s->cirrus_blt_bgcol;
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} else {
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bits_xor = 0x00;
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col = s->cirrus_blt_fgcol;
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}
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pattern_y = s->cirrus_blt_srcaddr & 7;
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for(y = 0; y < bltheight; y++) {
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bits = src[pattern_y] ^ bits_xor;
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bitpos = 7 - srcskipleft;
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d = dst + dstskipleft;
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for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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if ((bits >> bitpos) & 1) {
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PUTPIXEL();
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}
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d += (DEPTH / 8);
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bitpos = (bitpos - 1) & 7;
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}
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pattern_y = (pattern_y + 1) & 7;
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dst += dstpitch;
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}
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}
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static void
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glue(glue(glue(cirrus_colorexpand_pattern_, ROP_NAME), _),DEPTH)
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(CirrusVGAState * s, uint8_t * dst,
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const uint8_t * src,
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int dstpitch, int srcpitch,
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int bltwidth, int bltheight)
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{
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uint32_t colors[2];
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uint8_t *d;
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int x, y, bitpos, pattern_y;
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unsigned int bits;
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unsigned int col;
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int srcskipleft = s->vga.gr[0x2f] & 0x07;
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int dstskipleft = srcskipleft * (DEPTH / 8);
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colors[0] = s->cirrus_blt_bgcol;
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colors[1] = s->cirrus_blt_fgcol;
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pattern_y = s->cirrus_blt_srcaddr & 7;
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for(y = 0; y < bltheight; y++) {
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bits = src[pattern_y];
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bitpos = 7 - srcskipleft;
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d = dst + dstskipleft;
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for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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col = colors[(bits >> bitpos) & 1];
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PUTPIXEL();
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d += (DEPTH / 8);
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bitpos = (bitpos - 1) & 7;
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}
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pattern_y = (pattern_y + 1) & 7;
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dst += dstpitch;
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}
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}
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static void
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glue(glue(glue(cirrus_fill_, ROP_NAME), _),DEPTH)
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(CirrusVGAState *s,
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uint8_t *dst, int dst_pitch,
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int width, int height)
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{
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uint8_t *d, *d1;
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uint32_t col;
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int x, y;
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col = s->cirrus_blt_fgcol;
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d1 = dst;
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for(y = 0; y < height; y++) {
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d = d1;
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for(x = 0; x < width; x += (DEPTH / 8)) {
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PUTPIXEL();
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d += (DEPTH / 8);
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}
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d1 += dst_pitch;
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}
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}
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#undef DEPTH
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#undef PUTPIXEL
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