146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*
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* Pixel drawing function templates for QEMU SM501 Device
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*
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* Copyright (c) 2008 Shin-ichiro KAWASAKI
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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 BPP 1
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#define PIXEL_TYPE uint8_t
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#elif DEPTH == 15 || DEPTH == 16
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#define BPP 2
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#define PIXEL_TYPE uint16_t
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#elif DEPTH == 32
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#define BPP 4
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#define PIXEL_TYPE uint32_t
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#else
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#error unsupport depth
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#endif
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#ifdef BGR_FORMAT
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#define PIXEL_NAME glue(DEPTH, bgr)
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#else
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#define PIXEL_NAME DEPTH
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#endif /* BGR_FORMAT */
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static void glue(draw_line8_, PIXEL_NAME)(
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uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
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{
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uint8_t v, r, g, b;
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do {
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v = ldub_raw(s);
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r = (pal[v] >> 16) & 0xff;
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g = (pal[v] >> 8) & 0xff;
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b = (pal[v] >> 0) & 0xff;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
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s ++;
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d += BPP;
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} while (-- width != 0);
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}
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static void glue(draw_line16_, PIXEL_NAME)(
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uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
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{
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uint16_t rgb565;
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uint8_t r, g, b;
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do {
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rgb565 = lduw_raw(s);
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r = ((rgb565 >> 11) & 0x1f) << 3;
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g = ((rgb565 >> 5) & 0x3f) << 2;
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b = ((rgb565 >> 0) & 0x1f) << 3;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
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s += 2;
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d += BPP;
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} while (-- width != 0);
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}
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static void glue(draw_line32_, PIXEL_NAME)(
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uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
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{
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uint8_t r, g, b;
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do {
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ldub_raw(s);
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#if defined(TARGET_WORDS_BIGENDIAN)
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r = s[1];
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g = s[2];
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b = s[3];
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#else
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b = s[0];
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g = s[1];
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r = s[2];
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#endif
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
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s += 4;
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d += BPP;
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} while (-- width != 0);
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}
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/**
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* Draw hardware cursor image on the given line.
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*/
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static void glue(draw_hwc_line_, PIXEL_NAME)(SM501State * s, int crt,
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uint8_t * palette, int c_y, uint8_t *d, int width)
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{
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int x, i;
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uint8_t bitset = 0;
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/* get hardware cursor pattern */
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uint32_t cursor_addr = get_hwc_address(s, crt);
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assert(0 <= c_y && c_y < SM501_HWC_HEIGHT);
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cursor_addr += 64 * c_y / 4; /* 4 pixels per byte */
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cursor_addr += s->base;
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/* get cursor position */
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x = get_hwc_x(s, crt);
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d += x * BPP;
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for (i = 0; i < SM501_HWC_WIDTH && x + i < width; i++) {
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uint8_t v;
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/* get pixel value */
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if (i % 4 == 0) {
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bitset = ldub_phys(cursor_addr);
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cursor_addr++;
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}
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v = bitset & 3;
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bitset >>= 2;
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/* write pixel */
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if (v) {
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v--;
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uint8_t r = palette[v * 3 + 0];
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uint8_t g = palette[v * 3 + 1];
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uint8_t b = palette[v * 3 + 2];
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
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}
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d += BPP;
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}
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}
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#undef DEPTH
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#undef BPP
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#undef PIXEL_TYPE
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#undef PIXEL_NAME
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#undef BGR_FORMAT
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