From b76cbd9c17c8001bdba243dffe6df0199b2cf049 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Sun, 27 Aug 2006 16:04:13 -0700 Subject: [PATCH] More work on the VESA graphics console --- com32/lib/sys/vesa/alphatbl.pl | 48 +++++++++++++ com32/lib/sys/vesa/initvesa.c | 149 +++++++++++++++++++++++++++++++++++++++++ com32/lib/sys/vesa/vesa.h | 100 +++++++++++++++++++++++++++ com32/lib/sys/vesa/video.h | 39 +++++++++++ 4 files changed, 336 insertions(+) create mode 100755 com32/lib/sys/vesa/alphatbl.pl create mode 100644 com32/lib/sys/vesa/initvesa.c create mode 100644 com32/lib/sys/vesa/vesa.h create mode 100644 com32/lib/sys/vesa/video.h diff --git a/com32/lib/sys/vesa/alphatbl.pl b/com32/lib/sys/vesa/alphatbl.pl new file mode 100755 index 0000000..e49ff3e --- /dev/null +++ b/com32/lib/sys/vesa/alphatbl.pl @@ -0,0 +1,48 @@ +#!/usr/bin/perl +# +# Compute the alpha-blending table for 256 possible (R, G, B) value +# compared with the 4-bit intensity value from the character attribute +# + +# +# Configurable parameters... +# +@text_intensity = (0.0, 0.3333, 0.6667, 1.0); +$text_alpha = 0.5; +$input_gamma = 1.7; +$text_gamma = 1.7; +$output_gamma = 1.7; + +sub ungamma($$) { + my($v, $gamma) = @_; + + return $v**$gamma; +} + +sub gamma($$) { + my($v, $gamma) = @_; + return $v**(1/$gamma); +} + +print "unsigned char __vesacon_alpha_tbl[256][4] = {\n"; + +for ($i = 0; $i <= 255; $i++) { + $ival = ungamma($i/255, $input_gamma); + + $intro = "\t{"; + + for ($j = 0; $j < 4; $j++) { + $v = ($ival*(1-$text_alpha)) + + ungamma($text_intensity[$j], $text_gamma)*$text_alpha; + + $d = int(gamma($v,$output_gamma)*255+0.5); + + $d = 0 if ($d < 0); + $d = 255 if ($d > 255); + + printf "%s%3d", $intro, $d; + $intro = ', '; + } + print "},\n"; +} +print "};\n"; diff --git a/com32/lib/sys/vesa/initvesa.c b/com32/lib/sys/vesa/initvesa.c new file mode 100644 index 0000000..43b3498 --- /dev/null +++ b/com32/lib/sys/vesa/initvesa.c @@ -0,0 +1,149 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 1999-2006 H. Peter Anvin - All Rights Reserved + * + * 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. + * + * ----------------------------------------------------------------------- */ + +/* + * initvesa.c + * + * Query the VESA BIOS and select a 640x480x32 mode with local mapping + * support, if one exists. + */ + +#include +#include +#include +#include "vesa.h" +#include "video.h" + +struct vesa_general_info __vesa_general_info; +struct vesa_mode_info __vesa_mode_info; + +uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT]; +uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE]; +uint32_t __vesacon_shadowfb[VIDEO_Y_SIZE][VIDEO_X_SIZE]; + +static void unpack_font(uint8_t *dst, uint8_t *src, int height) +{ + int i; + + for (i = 0; i < FONT_MAX_CHARS; i++) { + memcpy(dst, src, height); + memset(dst+height, 0, 32-height); + + dst += 32; + src += height; + } +} + +static int vesacon_set_mode(void) +{ + com32sys_t rm; + uint8_t *rom_font; + uint16_t mode, *mode_ptr; + struct vesa_general_info *gi; + struct vesa_mode_info *mi; + + /* Allocate space in the bounce buffer for these structures */ + gi = &((struct vesa_info *)__com32.cs_bounce)->gi; + mi = &((struct vesa_info *)__com32.cs_bounce)->mi; + + memset(&rm, 0, sizeof rm); + + gi->signature = VBE2_MAGIC; /* Get VBE2 extended data */ + rm.eax.w[0] = 0x4F00; /* Get SVGA general information */ + rm.edi.w[0] = OFFS(gi); + rm.es = SEG(gi); + __intcall(0x10, &rm, &rm); + + if ( rm.eax.w[0] != 0x004F ) + return 1; /* Function call failed */ + if ( gi->signature != VESA_MAGIC ) + return 2; /* No magic */ + if ( gi->version < 0x0200 ) { + return 3; /* VESA 2.0 not supported */ + } + + /* Search for a 640x480 32-bit linear frame buffer mode */ + mode_ptr = CVT_PTR(gi->video_mode_ptr); + + for(;;) { + if ((mode = *mode_ptr++) == 0xFFFF) + return 4; /* No mode found */ + + rm.eax.w[0] = 0x4F01; /* Get SVGA mode information */ + rm.ecx.w[0] = mode; + rm.edi.w[0] = OFFS(mi); + rm.es = SEG(mi); + __intcall(0x10, &rm, &rm); + + /* Must be a supported mode */ + if ( rm.eax.w[0] != 0x004f ) + continue; + /* Must be an LFB color graphics mode supported by the hardware */ + if ( (mi->mode_attr & 0x0099) != 0x0099 ) + continue; + /* Must be 640x480, 32 bpp */ + if ( mi->h_res != VIDEO_X_SIZE || mi->v_res != VIDEO_Y_SIZE || + mi->bpp != 32 ) + continue; + /* Must either be a packed-pixel mode or a direct color mode + (depending on VESA version ) */ + if ( mi->memory_layout != 4 && /* Packed pixel */ + (mi->memory_layout != 6 || mi->rpos != 24 || + mi->gpos != 16 || mi->bpos != 0) ) + continue; + + /* Hey, looks like we found something we can live with */ + break; + } + + /* Download the BIOS-provided font */ + rm.eax.w[0] = 0x1130; /* Get Font Information */ + rm.ebx.w[0] = 0x0600; /* Get 8x16 ROM font */ + __intcall(0x10, &rm, &rm); + rom_font = MK_PTR(rm.es, rm.ebp.w[0]); + unpack_font(graphics_font, rom_font, 16); + + /* Now set video mode */ + rm.eax.w[0] = 0x4F02; /* Set SVGA video mode */ + rm.ebx.w[0] = mode | 0xC000; /* Don't clear video RAM, use linear fb */ + __intcall(0x10, &rm, &rm); + if ( rm.eax.w[0] != 0x004F ) { + rm.eax.w[0] = 0x0003; /* Set regular text mode */ + __intcall(0x10, &rm, NULL); + return 9; /* Failed to set mode */ + } + + /* Copy established state out of the bounce buffer */ + memcpy(&__vesa_info, __com32.cs_bounce, sizeof __vesa_info); + + return 0; +} + +int __vesacon_init(void) +{ + return vesacon_set_mode(); +} diff --git a/com32/lib/sys/vesa/vesa.h b/com32/lib/sys/vesa/vesa.h new file mode 100644 index 0000000..55e64b4 --- /dev/null +++ b/com32/lib/sys/vesa/vesa.h @@ -0,0 +1,100 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 1999-2006 H. Peter Anvin - All Rights Reserved + * + * 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. + * + * ----------------------------------------------------------------------- */ + +#ifndef LIB_SYS_VESA_H +#define LIB_SYS_VESA_H + +#include +#include + +/* VESA General Information table */ +struct vesa_general_info { + uint32_t signature; /* Magic number = "VESA" */ + uint16_t version; + far_ptr_t vendor_string; + uint8_t capabilities[4]; + far_ptr_t video_mode_ptr; + uint32_t total_memory; + + uint16_t oem_software_rev; + far_ptr_t oem_vendor_name_ptr; + far_ptr_t oem_product_name_ptr; + far_ptr_t oem_product_rev_ptr; + + uint8_t reserved[222]; + uint8_t oem_data[256]; +} __attribute__((packed)); + +#define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24)) +#define VBE2_MAGIC ('V' + ('B' << 8) + ('E' << 16) + ('2' << 24)) + +struct vesa_mode_info { + uint16_t mode_attr; + uint8_t win_attr[2]; + uint16_t win_grain; + uint16_t win_size; + uint16_t win_seg[2]; + far_ptr_t win_scheme; + uint16_t logical_scan; + + uint16_t h_res; + uint16_t v_res; + uint8_t char_width; + uint8_t char_height; + uint8_t memory_planes; + uint8_t bpp; + uint8_t banks; + uint8_t memory_layout; + uint8_t bank_size; + uint8_t image_planes; + uint8_t page_function; + + uint8_t rmask; + uint8_t rpos; + uint8_t gmask; + uint8_t gpos; + uint8_t bmask; + uint8_t bpos; + uint8_t resv_mask; + uint8_t resv_pos; + uint8_t dcm_info; + + uint8_t *lfb_ptr; /* Linear frame buffer address */ + uint8_t *offscreen_ptr; /* Offscreen memory address */ + uint16_t offscreen_size; + + uint8_t reserved[206]; +} __attribute__((packed)); + +struct vesa_info { + struct vesa_general_info gi; + struct vesa_mode_info mi; +}; + +extern struct vesa_info __vesa_info; + +#endif /* LIB_SYS_VESA_H */ diff --git a/com32/lib/sys/vesa/video.h b/com32/lib/sys/vesa/video.h new file mode 100644 index 0000000..acbbc10 --- /dev/null +++ b/com32/lib/sys/vesa/video.h @@ -0,0 +1,39 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2006 H. Peter Anvin - All Rights Reserved + * + * 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. + * + * ----------------------------------------------------------------------- */ + +#ifndef LIB_SYS_VESA_VIDEO_H +#define LIB_SYS_VESA_VIDEO_H + +#define FONT_MAX_CHARS 256 +#define FONT_MAX_HEIGHT 32 + +#define VIDEO_X_SIZE 640 +#define VIDEO_Y_SIZE 480 + +extern uint8_t graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT]; + +#endif /* LIB_SYS_VESA_VIDEO_H */ -- 2.7.4