-#include <hw/cpu/cpu.h>
-#include <hw/dos/dos.h>
-#include <hw/vga/vga.h>
-//#include <hw/vga/vrl.h>
-
-#include "src/tesuto.h"
-
-global_game_variables_t gvar;
-
-static unsigned char palette[768];
-
-int main(int argc,char **argv) {
- struct vrl1_vgax_header *vrl_header;
- vrl1_vgax_offset_t *vrl_lineoffs;
- unsigned char *buffer;
- unsigned int bufsz;
- int fd;
-
- if (argc < 3) {
- fprintf(stderr,"drawvrl <VRL file> <palette file>\n");
- return 1;
- }
-
- fd = open(argv[1],O_RDONLY|O_BINARY);
- if (fd < 0) {
- fprintf(stderr,"Unable to open '%s'\n",argv[1]);
- return 1;
- }
- {
- unsigned long sz = lseek(fd,0,SEEK_END);
- if (sz < sizeof(*vrl_header)) return 1;
- if (sz >= 65535UL) return 1;
-
- bufsz = (unsigned int)sz;
- buffer = malloc(bufsz);
- if (buffer == NULL) return 1;
-
- lseek(fd,0,SEEK_SET);
- if ((unsigned int)read(fd,buffer,bufsz) < bufsz) return 1;
-
- vrl_header = (struct vrl1_vgax_header*)buffer;
- if (memcmp(vrl_header->vrl_sig,"VRL1",4) || memcmp(vrl_header->fmt_sig,"VGAX",4)) return 1;
- if (vrl_header->width == 0 || vrl_header->height == 0) return 1;
- }
- close(fd);
-
- probe_dos();
- if (!probe_vga()) {
- printf("VGA probe failed\n");
- return 1;
- }
- int10_setmode(19);
- update_state_from_vga();
- //vga_enable_256color_modex(); // VGA mode X
- VGAmodeX(1, &gvar);
-
- /* load color palette */
- fd = open(argv[2],O_RDONLY|O_BINARY);
- if (fd >= 0) {
- unsigned int i;
-
- read(fd,palette,768);
- close(fd);
-
- vga_palette_lseek(0);
- for (i=0;i < 256;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);
- }
-
- /* preprocess the sprite to generate line offsets */
- vrl_lineoffs = vrl1_vgax_genlineoffsets(vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
- if (vrl_lineoffs == NULL) return 1;
-
- {
- unsigned int i,j,o;
-
- /* fill screen with a distinctive pattern */
- for (i=0;i < 320;i++) {
- o = i >> 2;
- vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
- for (j=0;j < 240;j++,o += vga_state.vga_stride)
- vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
- }
- }
- while (getch() != 13);
-
- /* make distinctive pattern offscreen, render sprite, copy onscreen */
- {
- const unsigned int offscreen_ofs = 0x8000; /* middle of VGA RAM */
- unsigned int i,j,o,o2,x,y,rx,ry,w,h;
- unsigned int overdraw = 1; // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.
- // if the sprite's edge pixels are clear anyway, you can set this to 0.
- VGA_RAM_PTR omemptr;
- int xdir=1,ydir=1;
-
- /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */
- x = 0;
- y = 0;
-
- /* do it */
- omemptr = vga_state.vga_graphics_ram; // save original mem ptr
- while (1) {
- /* stop animating if the user hits ENTER */
- if (kbhit()) {
- if (getch() == 13) break;
- }
-
- /* render box bounds. y does not need modification, but x and width must be multiple of 4 */
- if (x >= overdraw) rx = (x - overdraw) & (~3);
- else rx = 0;
- if (y >= overdraw) ry = (y - overdraw);
- else ry = 0;
- h = vrl_header->height + overdraw + y - ry;
- w = (x + vrl_header->width + (overdraw*2) + 3 - rx) & (~3);
- if ((rx+w) > 320) w = 320-rx;
-
- /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */
- vga_state.vga_draw_stride = w >> 2;
- vga_state.vga_graphics_ram = omemptr + offscreen_ofs;
-
- /* first draw pattern corresponding to that part of the screen. this COULD be optimized, obviously, but it's designed for study.
- * also note we don't have to use the same stride as the display! */
- for (i=rx;i < (rx+w);i++) {
- o = (i-rx) >> 2;
- vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
- for (j=ry;j < (ry+h);j++,o += vga_state.vga_draw_stride)
- vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
- }
-
- /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */
- draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
-
- /* restore ptr */
- vga_state.vga_graphics_ram = omemptr;
-
- /* block copy to visible RAM from offscreen */
- // TODO: Maybe it would be better for VGA state to have "display stride" vs "draw stride" to avoid saving/restoring like this?
- vga_setup_wm1_block_copy();
- o = offscreen_ofs; // source offscreen
- o2 = (ry * vga_state.vga_stride) + (rx >> 2); // dest visible (original stride)
- for (i=0;i < h;i++,o += vga_state.vga_draw_stride,o2 += vga_state.vga_stride) vga_wm1_mem_block_copy(o2,o,w >> 2);
- /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
- vga_restore_rm0wm0();
-
- /* restore stride */
- vga_state.vga_draw_stride = vga_state.vga_stride;
-
- /* step */
- x += xdir;
- y += ydir;
- if (x >= (319 - vrl_header->width) || x >= 319 || x == 0)
- xdir = -xdir;
- if (y >= (239 - vrl_header->height) || y >= 239 || y == 0)
- ydir = -ydir;
- }
- }
-
- /* make distinctive pattern offscreen, render sprite, copy onscreen.
- * this time, we render the distinctive pattern to another offscreen location and just copy.
- * note this version is much faster too! */
- {
- const unsigned int offscreen_ofs = 0x8000; /* middle of VGA RAM */
- const unsigned int pattern_ofs = 0xC000;
- unsigned int i,j,o,o2,x,y,rx,ry,w,h;
- unsigned int overdraw = 1; // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.
- // if the sprite's edge pixels are clear anyway, you can set this to 0.
- VGA_RAM_PTR omemptr;
- int xdir=1,ydir=1;
-
- /* fill pattern offset with a distinctive pattern */
- for (i=0;i < 320;i++) {
- o = (i >> 2) + pattern_ofs;
- vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
- for (j=0;j < 240;j++,o += vga_state.vga_stride)
- vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
- }
-
- /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */
- x = 0;
- y = 0;
-
- /* do it */
- omemptr = vga_state.vga_graphics_ram; // save original mem ptr
- while (1) {
- /* stop animating if the user hits ENTER */
- if (kbhit()) {
- if (getch() == 13) break;
- }
-
- /* render box bounds. y does not need modification, but x and width must be multiple of 4 */
- if (x >= overdraw) rx = (x - overdraw) & (~3);
- else rx = 0;
- if (y >= overdraw) ry = (y - overdraw);
- else ry = 0;
- h = vrl_header->height + overdraw + y - ry;
- w = (x + vrl_header->width + (overdraw*2) + 3 - rx) & (~3);
- if ((rx+w) > 320) w = 320-rx;
-
- /* block copy pattern to where we will draw the sprite */
- vga_setup_wm1_block_copy();
- o2 = offscreen_ofs;
- o = pattern_ofs + (ry * vga_state.vga_stride) + (rx >> 2); // source offscreen
- for (i=0;i < vrl_header->height;i++,o += vga_state.vga_stride,o2 += (w >> 2)) vga_wm1_mem_block_copy(o2,o,w >> 2);
- /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
- vga_restore_rm0wm0();
-
- /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */
- vga_state.vga_draw_stride = w >> 2;
- vga_state.vga_graphics_ram = omemptr + offscreen_ofs;
-
- /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */
- draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
-
- /* restore ptr */
- vga_state.vga_graphics_ram = omemptr;
-
- /* block copy to visible RAM from offscreen */
- // TODO: Maybe it would be better for VGA state to have "display stride" vs "draw stride" to avoid saving/restoring like this?
- vga_setup_wm1_block_copy();
- o = offscreen_ofs; // source offscreen
- o2 = (ry * vga_state.vga_stride) + (rx >> 2); // dest visible (original stride)
- for (i=0;i < vrl_header->height;i++,o += vga_state.vga_draw_stride,o2 += vga_state.vga_stride) vga_wm1_mem_block_copy(o2,o,w >> 2);
- /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
- vga_restore_rm0wm0();
-
- /* restore stride */
- vga_state.vga_draw_stride = vga_state.vga_stride;
-
- /* step */
- x += xdir;
- y += ydir;
- if (x >= (319 - vrl_header->width) || x >= 319 || x == 0)
- xdir = -xdir;
- if (y >= (239 - vrl_header->height) || y >= 239 || y == 0)
- ydir = -ydir;
- }
- }
-
- int10_setmode(3);
- //VGAmodeX(0, &gvar);
- free(vrl_lineoffs);
- buffer = NULL;
- free(buffer);
- bufsz = 0;
- return 0;
-}
+#include <hw/cpu/cpu.h>\r
+#include <hw/dos/dos.h>\r
+#include <hw/vga/vga.h>\r
+#include <hw/vga/vrl.h>\r
+\r
+#include "src/tesuto.h"\r
+\r
+static unsigned char palette[768];\r
+\r
+int main(int argc,char **argv) {\r
+ struct vrl1_vgax_header *vrl_header;\r
+ vrl1_vgax_offset_t *vrl_lineoffs;\r
+ unsigned char *buffer;\r
+ unsigned int bufsz;\r
+ int fd;\r
+\r
+ if (argc < 3) {\r
+ fprintf(stderr,"drawvrl <VRL file> <palette file>\n");\r
+ return 1;\r
+ }\r
+\r
+ fd = open(argv[1],O_RDONLY|O_BINARY);\r
+ if (fd < 0) {\r
+ fprintf(stderr,"Unable to open '%s'\n",argv[1]);\r
+ return 1;\r
+ }\r
+ {\r
+ unsigned long sz = lseek(fd,0,SEEK_END);\r
+ if (sz < sizeof(*vrl_header)) return 1;\r
+ if (sz >= 65535UL) return 1;\r
+\r
+ bufsz = (unsigned int)sz;\r
+ buffer = malloc(bufsz);\r
+ if (buffer == NULL) return 1;\r
+\r
+ lseek(fd,0,SEEK_SET);\r
+ if ((unsigned int)read(fd,buffer,bufsz) < bufsz) return 1;\r
+\r
+ vrl_header = (struct vrl1_vgax_header*)buffer;\r
+ if (memcmp(vrl_header->vrl_sig,"VRL1",4) || memcmp(vrl_header->fmt_sig,"VGAX",4)) return 1;\r
+ if (vrl_header->width == 0 || vrl_header->height == 0) return 1;\r
+ }\r
+ close(fd);\r
+\r
+ probe_dos();\r
+ if (!probe_vga()) {\r
+ printf("VGA probe failed\n");\r
+ return 1;\r
+ }\r
+ int10_setmode(19);\r
+ update_state_from_vga();\r
+ vga_enable_256color_modex(); // VGA mode X\r
+ vga_state.vga_width = 320; // VGA lib currently does not update this\r
+ vga_state.vga_height = 240; // VGA lib currently does not update this\r
+\r
+#if 1 // 320x240 test mode: this is how Project 16 is using our code, enable for test case\r
+ {\r
+ struct vga_mode_params cm;\r
+\r
+ vga_read_crtc_mode(&cm);\r
+\r
+ // 320x240 mode 60Hz\r
+ cm.vertical_total = 525;\r
+ cm.vertical_start_retrace = 0x1EA;\r
+ cm.vertical_end_retrace = 0x1EC;\r
+ cm.vertical_display_end = 480;\r
+ cm.vertical_blank_start = 489;\r
+ cm.vertical_blank_end = 517;\r
+\r
+ vga_write_crtc_mode(&cm,0);\r
+ }\r
+ vga_state.vga_height = 240; // VGA lib currently does not update this\r
+#endif\r
+\r
+ /* load color palette */\r
+ fd = open(argv[2],O_RDONLY|O_BINARY);\r
+ if (fd >= 0) {\r
+ unsigned int i;\r
+\r
+ read(fd,palette,768);\r
+ close(fd);\r
+\r
+ vga_palette_lseek(0);\r
+ for (i=0;i < 256;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);\r
+ }\r
+\r
+ /* preprocess the sprite to generate line offsets */\r
+ vrl_lineoffs = vrl1_vgax_genlineoffsets(vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));\r
+ if (vrl_lineoffs == NULL) return 1;\r
+\r
+ {\r
+ unsigned int i,j,o;\r
+\r
+ /* fill screen with a distinctive pattern */\r
+ for (i=0;i < vga_state.vga_width;i++) {\r
+ o = i >> 2;\r
+ vga_write_sequencer(0x02/*map mask*/,1 << (i&3));\r
+ for (j=0;j < vga_state.vga_height;j++,o += vga_state.vga_stride)\r
+ vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!\r
+ }\r
+ }\r
+ //while (getch() != 13);\r
+\r
+ /* make distinctive pattern offscreen, render sprite, copy onscreen */\r
+ {\r
+ const unsigned int offscreen_ofs = (vga_state.vga_stride * vga_state.vga_height);\r
+ unsigned int i,j,o,o2,x,y,rx,ry,w,h;\r
+ unsigned int overdraw = 1; // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.\r
+ // if the sprite's edge pixels are clear anyway, you can set this to 0.\r
+ VGA_RAM_PTR omemptr;\r
+ int xdir=1,ydir=1;\r
+\r
+ /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */\r
+ x = 0;\r
+ y = 0;\r
+\r
+ /* do it */\r
+ omemptr = vga_state.vga_graphics_ram; // save original mem ptr\r
+ while (1) {\r
+ /* stop animating if the user hits ENTER */\r
+ if (kbhit()) {\r
+ if (getch() == 13) break;\r
+ }\r
+\r
+ /* render box bounds. y does not need modification, but x and width must be multiple of 4 */\r
+ if (x >= overdraw) rx = (x - overdraw) & (~3);\r
+ else rx = 0;\r
+ if (y >= overdraw) ry = (y - overdraw);\r
+ else ry = 0;\r
+ h = vrl_header->height + overdraw + y - ry;\r
+ w = (x + vrl_header->width + (overdraw*2) + 3/*round up*/ - rx) & (~3);\r
+ if ((rx+w) > vga_state.vga_width) w = vga_state.vga_width-rx;\r
+ if ((ry+h) > vga_state.vga_height) h = vga_state.vga_height-ry;\r
+\r
+ /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */\r
+ vga_state.vga_draw_stride_limit = (vga_state.vga_width + 3/*round up*/ - x) >> 2;\r
+ vga_state.vga_draw_stride = w >> 2;\r
+ vga_state.vga_graphics_ram = omemptr + offscreen_ofs;\r
+\r
+ /* first draw pattern corresponding to that part of the screen. this COULD be optimized, obviously, but it's designed for study.\r
+ * also note we don't have to use the same stride as the display! */\r
+ for (i=rx;i < (rx+w);i++) {\r
+ o = (i-rx) >> 2;\r
+ vga_write_sequencer(0x02/*map mask*/,1 << (i&3));\r
+ for (j=ry;j < (ry+h);j++,o += vga_state.vga_draw_stride)\r
+ vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!\r
+ }\r
+\r
+ /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */\r
+ draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));\r
+\r
+ /* restore ptr */\r
+ vga_state.vga_graphics_ram = omemptr;\r
+\r
+ /* block copy to visible RAM from offscreen */\r
+ vga_setup_wm1_block_copy();\r
+ o = offscreen_ofs; // source offscreen\r
+ o2 = (ry * vga_state.vga_stride) + (rx >> 2); // dest visible (original stride)\r
+ for (i=0;i < h;i++,o += vga_state.vga_draw_stride,o2 += vga_state.vga_stride) vga_wm1_mem_block_copy(o2,o,w >> 2);\r
+ /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */\r
+ vga_restore_rm0wm0();\r
+\r
+ /* restore stride */\r
+ vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = vga_state.vga_stride;\r
+\r
+ /* step */\r
+ x += xdir;\r
+ y += ydir;\r
+ if (x >= (vga_state.vga_width - 1) || x == 0)\r
+ xdir = -xdir;\r
+ if (y >= (vga_state.vga_height - 1) || y == 0)\r
+ ydir = -ydir;\r
+ }\r
+ }\r
+\r
+ /* make distinctive pattern offscreen, render sprite, copy onscreen.\r
+ * this time, we render the distinctive pattern to another offscreen location and just copy.\r
+ * note this version is much faster too! */\r
+ {\r
+ const unsigned int offscreen_ofs = (vga_state.vga_stride * vga_state.vga_height);\r
+ const unsigned int pattern_ofs = 0x10000UL - (vga_state.vga_stride * vga_state.vga_height);\r
+ unsigned int i,j,o,o2,x,y,rx,ry,w,h;\r
+ unsigned int overdraw = 1; // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.\r
+ // if the sprite's edge pixels are clear anyway, you can set this to 0.\r
+ VGA_RAM_PTR omemptr;\r
+ int xdir=1,ydir=1;\r
+\r
+ /* fill pattern offset with a distinctive pattern */\r
+ for (i=0;i < vga_state.vga_width;i++) {\r
+ o = (i >> 2) + pattern_ofs;\r
+ vga_write_sequencer(0x02/*map mask*/,1 << (i&3));\r
+ for (j=0;j < vga_state.vga_height;j++,o += vga_state.vga_stride)\r
+ vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!\r
+ }\r
+\r
+ /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */\r
+ x = 0;\r
+ y = 0;\r
+\r
+ /* do it */\r
+ omemptr = vga_state.vga_graphics_ram; // save original mem ptr\r
+ while (1) {\r
+ /* stop animating if the user hits ENTER */\r
+ if (kbhit()) {\r
+ if (getch() == 13) break;\r
+ }\r
+\r
+ /* render box bounds. y does not need modification, but x and width must be multiple of 4 */\r
+ if (x >= overdraw) rx = (x - overdraw) & (~3);\r
+ else rx = 0;\r
+ if (y >= overdraw) ry = (y - overdraw);\r
+ else ry = 0;\r
+ h = vrl_header->height + overdraw + y - ry;\r
+ w = (x + vrl_header->width + (overdraw*2) + 3/*round up*/ - rx) & (~3);\r
+ if ((rx+w) > vga_state.vga_width) w = vga_state.vga_width-rx;\r
+ if ((ry+h) > vga_state.vga_height) h = vga_state.vga_height-ry;\r
+\r
+ /* block copy pattern to where we will draw the sprite */\r
+ vga_setup_wm1_block_copy();\r
+ o2 = offscreen_ofs;\r
+ o = pattern_ofs + (ry * vga_state.vga_stride) + (rx >> 2); // source offscreen\r
+ for (i=0;i < h;i++,o += vga_state.vga_stride,o2 += (w >> 2)) vga_wm1_mem_block_copy(o2,o,w >> 2);\r
+ /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */\r
+ vga_restore_rm0wm0();\r
+\r
+ /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */\r
+ vga_state.vga_draw_stride_limit = (vga_state.vga_width + 3/*round up*/ - x) >> 2;\r
+ vga_state.vga_draw_stride = w >> 2;\r
+ vga_state.vga_graphics_ram = omemptr + offscreen_ofs;\r
+\r
+ /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */\r
+ draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));\r
+\r
+ /* restore ptr */\r
+ vga_state.vga_graphics_ram = omemptr;\r
+\r
+ /* block copy to visible RAM from offscreen */\r
+ vga_setup_wm1_block_copy();\r
+ o = offscreen_ofs; // source offscreen\r
+ o2 = (ry * vga_state.vga_stride) + (rx >> 2); // dest visible (original stride)\r
+ for (i=0;i < h;i++,o += vga_state.vga_draw_stride,o2 += vga_state.vga_stride) vga_wm1_mem_block_copy(o2,o,w >> 2);\r
+ /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */\r
+ vga_restore_rm0wm0();\r
+\r
+ /* restore stride */\r
+ vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = vga_state.vga_stride;\r
+\r
+ /* step */\r
+ x += xdir;\r
+ y += ydir;\r
+ if (x >= (vga_state.vga_width - 1) || x == 0)\r
+ xdir = -xdir;\r
+ if (y >= (vga_state.vga_height - 1) || y == 0)\r
+ ydir = -ydir;\r
+ }\r
+ }\r
+\r
+ /* another handy "demo" effect using VGA write mode 1.\r
+ * we can take what's on screen and vertically squash it like an old analog TV set turning off. */\r
+ {\r
+ unsigned int blank_line_ofs = (vga_state.vga_stride * vga_state.vga_height * 2);\r
+ unsigned int copy_ofs = (vga_state.vga_stride * vga_state.vga_height);\r
+ unsigned int display_ofs = 0x0000;\r
+ unsigned int i,y,soh,doh,dstart;\r
+ unsigned int dh_blankfill = 8;\r
+ unsigned int dh_step = 8;\r
+ uint32_t sh,dh,yf,ystep;\r
+\r
+ /* copy active display (0) to offscreen buffer (0x4000) */\r
+ vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = vga_state.vga_stride;\r
+ vga_setup_wm1_block_copy();\r
+ vga_wm1_mem_block_copy(copy_ofs,display_ofs,vga_state.vga_stride * vga_state.vga_height);\r
+ vga_restore_rm0wm0();\r
+\r
+ /* need a blank line as well */\r
+ for (i=0;i < vga_state.vga_stride;i++) vga_state.vga_graphics_ram[i+blank_line_ofs] = 0;\r
+\r
+ sh = dh = vga_state.vga_height;\r
+ while (dh >= dh_step) {\r
+ /* stop animating if the user hits ENTER */\r
+ if (kbhit()) {\r
+ if (getch() == 13) break;\r
+ }\r
+\r
+ /* wait for vsync end */\r
+ vga_wait_for_vsync_end();\r
+\r
+ /* what scalefactor to use for stretching? */\r
+ ystep = (0x10000UL * sh) / dh;\r
+ dstart = (vga_state.vga_height - dh) / 2; // center the squash effect on screen, otherwise it would squash to top of screen\r
+ doh = display_ofs;\r
+ soh = copy_ofs;\r
+ yf = 0;\r
+ y = 0;\r
+\r
+ /* for performance, keep VGA in write mode 1 the entire render */\r
+ vga_setup_wm1_block_copy();\r
+\r
+ /* blank lines */\r
+ if (dstart >= dh_blankfill) y = dstart - dh_blankfill;\r
+ else y = 0;\r
+ doh = vga_state.vga_stride * y;\r
+\r
+ while (y < dstart) {\r
+ vga_wm1_mem_block_copy(doh,blank_line_ofs,vga_state.vga_stride);\r
+ doh += vga_state.vga_stride;\r
+ y++;\r
+ }\r
+\r
+ /* draw */\r
+ while (y < (dh+dstart)) {\r
+ soh = copy_ofs + ((yf >> 16UL) * vga_state.vga_stride);\r
+ vga_wm1_mem_block_copy(doh,soh,vga_state.vga_stride);\r
+ doh += vga_state.vga_stride;\r
+ yf += ystep;\r
+ y++;\r
+ }\r
+\r
+ /* blank lines */\r
+ while (y < vga_state.vga_height && y < (dh+dstart+dh_blankfill)) {\r
+ vga_wm1_mem_block_copy(doh,blank_line_ofs,vga_state.vga_stride);\r
+ doh += vga_state.vga_stride;\r
+ y++;\r
+ }\r
+\r
+ /* done */\r
+ vga_restore_rm0wm0();\r
+\r
+ /* wait for vsync */\r
+ vga_wait_for_vsync();\r
+\r
+ /* make it shrink */\r
+ dh -= dh_step;\r
+ if (dh < 40) dh_step = 1;\r
+ }\r
+ }\r
+\r
+ int10_setmode(3);\r
+ free(vrl_lineoffs);\r
+ buffer = NULL;\r
+ free(buffer);\r
+ bufsz = 0;\r
+ return 0;\r
+}\r
projects / 16.git / blobdiff