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Fixes #120 Implement a software renderer

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This commit is contained in:
Stefan Arentz 2017-01-08 03:40:23 +00:00
parent 582421ca3b
commit 139d07313d
2 changed files with 58 additions and 33 deletions
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2
src/Makefile
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@ -21,7 +21,7 @@
# SOFTWARE.
CC?=cc
CFLAGS=-std=gnu11 -O1 -g -Wall -Wextra -Werror -Wno-unused-parameter
CFLAGS=-std=gnu11 -O3 -g -Wall -Wextra -Werror -Wno-unused-parameter
LDFLAGS=-g -L/usr/local/lib
EWM_EXECUTABLE=ewm

89
src/scr.c
View File

@ -31,6 +31,11 @@
#include "chr.h"
#include "scr.h"
inline static void _set_pixel(SDL_Surface * surface, int x, int y, Uint32 color) {
uint32_t *pixel = (uint32_t*) ((uint8_t*) surface->pixels + (y * surface->pitch) + (x * sizeof(uint32_t)));
*pixel = color;
}
// Text rendering
static int txt_line_offsets[24] = {
@ -126,41 +131,66 @@ static SDL_Color lores_colors_green[16] = {
{ 47, 249, 64, 0 }, // 15 White
};
static inline void scr_render_lores_block(struct scr_t *scr, int row, int column, SDL_Color *colors) {
uint16_t base = (scr->two->screen_page == EWM_A2P_SCREEN_PAGE1) ? 0x0400 : 0x0800;
SDL_Surface *surface = SDL_GetWindowSurface(scr->window);
uint8_t block = scr->two->screen_txt_data[((txt_line_offsets[row] + base) + column) - 0x0400];
if (block != 0) {
SDL_Rect dst;
dst.x = column * 21;
dst.y = row * 24;
dst.w = 21;
dst.h = 12;
uint8_t c = block & 0x0f;
if (c != 0) {
SDL_FillRect(surface, &dst, SDL_MapRGB(surface->format, colors[c].r, colors[c].g, colors[c].b));
}
c = (block & 0xf0) >> 4;
if (c != 0) {
dst.y += 12;
SDL_FillRect(surface, &dst, SDL_MapRGB(surface->format, colors[c].r, colors[c].g, colors[c].b));
}
}
}
static inline void scr_render_lgr_screen(struct scr_t *scr, bool flash) {
bool mixed = (scr->two->screen_graphics_style == EWM_A2P_SCREEN_GRAPHICS_STYLE_MIXED);
SDL_Surface *surface = SDL_GetWindowSurface(scr->window);
uint32_t *colors = scr->color_scheme == EWM_SCR_COLOR_SCHEME_COLOR ? scr->lores_colors_color : scr->lores_colors_green;
uint16_t base = (scr->two->screen_page == EWM_A2P_SCREEN_PAGE1) ? 0x0400 : 0x0800;
// Render graphics
int rows = mixed ? 20 : 24;
for (int row = 0; row < rows; row++) {
for (int column = 0; column < 40; column++) {
scr_render_lores_block(scr, row, column,
scr->color_scheme == EWM_SCR_COLOR_SCHEME_COLOR ? lores_colors_color : lores_colors_green);
uint8_t block = scr->two->screen_txt_data[((txt_line_offsets[row] + base) + column) - 0x0400];
if (block != 0) {
SDL_Rect dst;
dst.x = column * 21;
dst.y = row * 24;
dst.w = 21;
dst.h = 12;
uint8_t c = block & 0x0f;
if (c != 0) {
SDL_FillRect(surface, &dst, colors[c]);
}
c = (block & 0xf0) >> 4;
if (c != 0) {
dst.y += 12;
SDL_FillRect(surface, &dst, colors[c]);
}
#if 0
int px = column * 21, py = row * 24;
uint8_t c = block & 0x0f;
if (c != 0) {
for (int h = 0; h < 12; h++) {
for (int w = 0; w <21; w++) {
_set_pixel(surface, px+w, py+h, colors[c]);
}
}
}
py += 12;
c = (block & 0xf0) >> 4;
if (c != 0) {
for (int h = 0; h < 12; h++) {
for (int w = 0; w <21; w++) {
_set_pixel(surface, px+w, py+h, colors[c]);
}
}
}
#endif
}
}
}
// Render bottom 4 lines
if (mixed) {
for (int row = 20; row < 24; row++) {
@ -216,11 +246,6 @@ static SDL_Color hires_colors[16] = {
{ 255, 255, 255, 0 } // 5 White
};
inline static void _set_pixel(SDL_Surface * surface, int x, int y, Uint32 color) {
uint32_t *pixel = (uint32_t*) ((uint8_t*) surface->pixels + (y * surface->pitch) + (x * sizeof(uint32_t)));
*pixel = color;
}
inline static void scr_render_hgr_line_green(struct scr_t *scr, int line, uint16_t line_base) {
SDL_Surface *surface = SDL_GetWindowSurface(scr->window);
uint32_t green = scr->text_color;