305 lines
11 KiB
C
305 lines
11 KiB
C
#include <pico/stdlib.h>
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#include "hires_color_patterns.h"
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#include "hires_dot_patterns.h"
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#include "common/config.h"
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#include "vga/vgabuf.h"
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#include "vga/render.h"
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#include "vga/vgaout.h"
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#include "vga/dhgr_patterns.h"
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static void render_dhgr_line(bool p2, uint line, bool mono);
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uint16_t DELAYED_COPY_DATA(dhgr_palette)[16] = {
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RGB_BLACK, RGB_DBLUE, RGB_DGREEN, RGB_HBLUE,
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RGB_BROWN, RGB_LGRAY, RGB_HGREEN, RGB_AQUA,
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RGB_MAGENTA, RGB_HVIOLET, RGB_DGRAY, RGB_LBLUE,
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RGB_HORANGE, RGB_PINK, RGB_YELLOW, RGB_WHITE
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};
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uint16_t __attribute__((section(".uninitialized_data."))) half_palette[16];
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//#define PAGE2SEL (!(soft_switches & SOFTSW_80STORE) && (soft_switches & SOFTSW_PAGE_2))
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#define PAGE2SEL ((soft_switches & (SOFTSW_80STORE | SOFTSW_PAGE_2)) == SOFTSW_PAGE_2)
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static inline uint dhgr_line_to_mem_offset(uint line) {
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return ((line & 0x07) << 10) | ((line & 0x38) << 4) | (((line & 0xc0) >> 6) * 40);
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}
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void DELAYED_COPY_CODE(render_dhgr)() {
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bool mono = mono_rendering;
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if((internal_flags & IFLAGS_VIDEO7) && ((internal_flags & IFLAGS_V7_MODE3) == IFLAGS_V7_MODE0)) {
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mono = true;
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}
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for(uint line=0; line < 192; line++) {
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render_dhgr_line(PAGE2SEL, line, mono);
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}
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}
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void DELAYED_COPY_CODE(render_mixed_dhgr)() {
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bool mono = mono_rendering;
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if((internal_flags & IFLAGS_VIDEO7) && ((internal_flags & IFLAGS_V7_MODE3) == IFLAGS_V7_MODE0)) {
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mono = true;
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}
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for(uint line=0; line < 160; line++) {
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render_dhgr_line(PAGE2SEL, line, mono);
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}
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render_mixed_text();
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}
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static void DELAYED_COPY_CODE(render_dhgr_line)(bool p2, uint line, bool mono) {
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struct vga_scanline *sl = vga_prepare_scanline();
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uint sl_pos = 0;
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uint i;
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const uint8_t *line_mema = (const uint8_t *)((p2 ? hgr_p2 : hgr_p1) + dhgr_line_to_mem_offset(line));
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const uint8_t *line_memb = (const uint8_t *)((p2 ? hgr_p4 : hgr_p3) + dhgr_line_to_mem_offset(line));
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if((internal_flags & IFLAGS_VIDEO7) && ((internal_flags & IFLAGS_V7_MODE3) == IFLAGS_V7_MODE2)) {
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// Pad 0 pixels on the left to center horizontally
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} else {
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// Pad 40 pixels on the left to center horizontally
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sl->data[sl_pos++] = (text_border|THEN_EXTEND_7) | ((text_border|THEN_EXTEND_7) << 16); // 16 pixels per word
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sl->data[sl_pos++] = (text_border|THEN_EXTEND_7) | ((text_border|THEN_EXTEND_7) << 16); // 16 pixels per word
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sl->data[sl_pos++] = (text_border|THEN_EXTEND_3) | ((text_border|THEN_EXTEND_3) << 16); // 16 pixels per word
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}
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// DHGR is weird. Video-7 just makes it weirder. Nuff said.
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uint32_t dots = 0;
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uint_fast8_t dotc = 0;
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uint32_t pixeldata;
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uint32_t pixelmode = 0;
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uint16_t white_pixel_count = 0;
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uint32_t color1, color2, color3, color4;
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i = 0;
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if(mono) {
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while(i < 40) {
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// Load in as many subpixels as possible
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while((dotc < 28) && (i < 40)) {
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dots |= (line_memb[i] & 0x7f) << dotc;
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dotc += 7;
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dots |= (line_mema[i] & 0x7f) << dotc;
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dotc += 7;
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i++;
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}
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// Consume pixels
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while(dotc) {
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pixeldata = ((dots & 1) ? (text_fore) : (text_back));
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dots >>= 1;
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pixeldata |= (((dots & 1) ? (text_fore) : (text_back))) << 16;
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dots >>= 1;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 2;
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}
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}
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} else if((internal_flags & IFLAGS_VIDEO7) && ((soft_switches & (SOFTSW_80STORE | SOFTSW_80COL)) == (SOFTSW_80STORE))) {
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int j;
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// Video 7 F/B HiRes
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while(i < 40) {
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dots = (line_mema[i] & 0x7f);
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color1 = lores_palette[(line_memb[i] >> 4) & 0xF];
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color2 = lores_palette[(line_memb[i] >> 0) & 0xF];
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i++;
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dots |= (line_mema[i] & 0x7f) << 7;
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color3 = lores_palette[(line_memb[i] >> 4) & 0xF];
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color4 = lores_palette[(line_memb[i] >> 0) & 0xF];
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i++;
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for(j = 0; j < 3; j++) {
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pixeldata = ((dots & 1) ? (color1) : (color2)) | THEN_EXTEND_1;
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dots >>= 1;
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pixeldata |= (((dots & 1) ? (color1) : (color2)) | THEN_EXTEND_1) << 16;
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dots >>= 1;
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sl->data[sl_pos++] = pixeldata;
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}
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pixeldata = ((dots & 1) ? (color1) : (color2)) | THEN_EXTEND_1;
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dots >>= 1;
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pixeldata |= (((dots & 1) ? (color3) : (color4)) | THEN_EXTEND_1) << 16;
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dots >>= 1;
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sl->data[sl_pos++] = pixeldata;
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for(j = 0; j < 3; j++) {
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pixeldata = ((dots & 1) ? (color3) : (color4)) | THEN_EXTEND_1;
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dots >>= 1;
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pixeldata |= (((dots & 1) ? (color3) : (color4)) | THEN_EXTEND_1) << 16;
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dots >>= 1;
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sl->data[sl_pos++] = pixeldata;
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}
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}
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} else if((internal_flags & IFLAGS_VIDEO7) && ((internal_flags & IFLAGS_V7_MODE3) == IFLAGS_V7_MODE2)) {
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// 160x192 Video-7
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while(i < 40) {
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// Load in as many subpixels as possible
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while((dotc <= 18) && (i < 40)) {
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dots |= (line_memb[i] & 0xff) << dotc;
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dotc += 8;
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dots |= (line_mema[i] & 0xff) << dotc;
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dotc += 8;
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i++;
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}
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// Consume pixels
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while(dotc >= 8) {
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pixeldata = (lores_palette[dots & 0xf] | THEN_EXTEND_3);
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dots >>= 4;
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pixeldata |= (lores_palette[dots & 0xf] | THEN_EXTEND_3) << 16;
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dots >>= 4;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 8;
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}
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}
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} else if((internal_flags & (IFLAGS_VIDEO7 | IFLAGS_V7_MODE3)) == (IFLAGS_VIDEO7 | IFLAGS_V7_MODE1)) {
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// Video-7 Mixed B&W/RGB
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while(i < 40) {
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// Load in as many subpixels as possible
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while((dotc <= 18) && (i < 40)) {
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dots |= (line_memb[i] & 0x7f) << dotc;
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pixelmode |= ((line_memb[i] & 0x80) ? 0x7f : 0x00) << dotc;
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dotc += 7;
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dots |= (line_mema[i] & 0x7f) << dotc;
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pixelmode |= ((line_mema[i] & 0x80) ? 0x7f : 0x00) << dotc;
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dotc += 7;
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i++;
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}
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// Consume pixels
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while(dotc >= 4) {
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if(pixelmode) {
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pixeldata = (dhgr_palette[dots & 0xf] | THEN_EXTEND_1);
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pixeldata |= pixeldata << 16;
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dots >>= 4;
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pixelmode >>= 4;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 4;
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} else {
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pixeldata = ((dots & 1) ? (text_fore) : (text_back));
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dots >>= 1;
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pixelmode >>= 1;
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pixeldata |= (((dots & 1) ? (text_fore) : (text_back))) << 16;
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dots >>= 1;
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pixelmode >>= 1;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 2;
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pixeldata = ((dots & 1) ? (text_fore) : (text_back));
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dots >>= 1;
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pixelmode >>= 1;
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pixeldata |= (((dots & 1) ? (text_fore) : (text_back))) << 16;
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dots >>= 1;
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pixelmode >>= 1;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 2;
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}
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}
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}
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} else if((internal_flags & (IFLAGS_INTERP | IFLAGS_GRILL)) == (IFLAGS_INTERP | IFLAGS_GRILL)) {
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// Preload black into the sliding window
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dots = 0;
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dotc = 4;
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while(i < 40) {
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// Load in as many subpixels as possible
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while((dotc <= 18) && (i < 40)) {
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dots |= (line_memb[i] & 0x7f) << dotc;
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dotc += 7;
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dots |= (line_mema[i] & 0x7f) << dotc;
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dotc += 7;
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i++;
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}
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while((dotc >= 8) || ((dotc > 0) && (i == 40))) {
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dots &= 0xfffffffe;
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dots |= (dots >> 4) & 1;
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pixeldata = half_palette[dots & 0xf];
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dots &= 0xfffffffc;
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dots |= (dots >> 4) & 3;
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pixeldata |= dhgr_palette[dots & 0xf] << 16;
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sl->data[sl_pos++] = pixeldata;
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dots &= 0xfffffff8;
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dots |= (dots >> 4) & 7;
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pixeldata = half_palette[dots & 0xf];
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dots >>= 4;
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pixeldata |= dhgr_palette[dots & 0xf] << 16;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 4;
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}
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}
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} else if(internal_flags & IFLAGS_INTERP) {
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// Preload black into the sliding window
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dots = 0;
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dotc = 4;
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while(i < 40) {
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// Load in as many subpixels as possible
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while((dotc <= 18) && (i < 40)) {
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dots |= (line_memb[i] & 0x7f) << dotc;
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dotc += 7;
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dots |= (line_mema[i] & 0x7f) << dotc;
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dotc += 7;
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i++;
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}
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while((dotc >= 8) || ((dotc > 0) && (i == 40))) {
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dots &= 0xfffffffe;
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dots |= (dots >> 4) & 1;
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pixeldata = dhgr_palette[dots & 0xf];
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dots &= 0xfffffffc;
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dots |= (dots >> 4) & 3;
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pixeldata |= dhgr_palette[dots & 0xf] << 16;
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sl->data[sl_pos++] = pixeldata;
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dots &= 0xfffffff8;
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dots |= (dots >> 4) & 7;
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pixeldata = dhgr_palette[dots & 0xf];
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dots >>= 4;
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pixeldata |= dhgr_palette[dots & 0xf] << 16;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 4;
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}
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}
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} else {
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while(i < 40) {
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// Load in as many subpixels as possible
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while((dotc <= 18) && (i < 40)) {
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dots |= (line_memb[i] & 0x7f) << dotc;
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dotc += 7;
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dots |= (line_mema[i] & 0x7f) << dotc;
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dotc += 7;
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i++;
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}
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// Consume pixels
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while(dotc >= 8) {
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pixeldata = (dhgr_palette[dots & 0xf] | THEN_EXTEND_3);
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dots >>= 4;
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pixeldata |= (dhgr_palette[dots & 0xf] | THEN_EXTEND_3) << 16;
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dots >>= 4;
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sl->data[sl_pos++] = pixeldata;
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dotc -= 8;
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}
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}
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}
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if((internal_flags & IFLAGS_VIDEO7) && ((internal_flags & IFLAGS_V7_MODE3) == IFLAGS_V7_MODE2)) {
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// Pad 0 pixels on the right to center horizontally
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} else {
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// Pad 40 pixels on the right to center horizontally
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sl->data[sl_pos++] = (text_border|THEN_EXTEND_7) | ((text_border|THEN_EXTEND_7) << 16); // 16 pixels per word
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sl->data[sl_pos++] = (text_border|THEN_EXTEND_7) | ((text_border|THEN_EXTEND_7) << 16); // 16 pixels per word
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sl->data[sl_pos++] = (text_border|THEN_EXTEND_3) | ((text_border|THEN_EXTEND_3) << 16); // 16 pixels per word
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}
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sl->length = sl_pos;
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sl->repeat_count = 1;
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vga_submit_scanline(sl);
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}
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