afef2e1d53
We only emulate the sysbus device in its default LE mode and PCI is LE as well so specify this for registers and framebuffer memory. Note that though the Linux kernel driver has code which claims to handle both big and little endian, it is obviously bogus for 16 bit and cannot be trusted as a source of information on the framebuffer pixel format. This is our best guess about device behaviour based on the specs and testing with MorphOS that is known to work on real HW. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Aurelien Jarno <aurelien@aurel32.net> Message-id: 8b9605a569f8bf54074e15903620b18cd9967c89.1492787889.git.balaton@eik.bme.hu Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
139 lines
3.8 KiB
C
139 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_p(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 = 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_le_p(s);
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r = (rgb565 >> 8) & 0xf8;
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g = (rgb565 >> 3) & 0xfc;
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b = (rgb565 << 3) & 0xf8;
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*(PIXEL_TYPE *)d = 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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r = s[2];
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g = s[1];
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b = s[0];
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*(PIXEL_TYPE *)d = 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 *pixval, 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 += SM501_HWC_WIDTH * c_y / 4; /* 4 pixels per byte */
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pixval = s->local_mem + cursor_addr;
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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_p(pixval);
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pixval++;
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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 = 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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