0bacfcef6c
Graphics viewport and coordinate mapping: - VIEW [[SCREEN] (x1,y1)-(x2,y2) [,[fill][,border]]] with clipping - WINDOW [[SCREEN] (x1,y1)-(x2,y2)] with Cartesian/screen modes - PALETTE [attribute, color] with CGA 16-color remapping - PMAP(coord, func) for logical/physical coordinate conversion - All graphics statements (PSET, LINE, CIRCLE, PAINT, GET/PUT) respect viewport clipping and WINDOW coordinate mapping MBF (Microsoft Binary Format) float support: - CVS/CVD now interpret bytes as MBF format (compatible with real GW-BASIC) - MKS$/MKD$ now produce MBF-encoded bytes - Fixed shift errors in MBF↔IEEE conversion routines (single: 1→0, double: 4→3) - Random-access file I/O now byte-compatible with original GWBASIC.EXE 66 tests (2 new), 61 compat matches (up from 58).
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
#ifndef GW_GRAPHICS_H
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#define GW_GRAPHICS_H
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#include <stdbool.h>
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void gfx_init(int mode);
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void gfx_shutdown(void);
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void gfx_cls(void);
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bool gfx_active(void);
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int gfx_get_mode(void);
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void gfx_pset(int x, int y, int color);
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int gfx_point(int x, int y);
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void gfx_line(int x1, int y1, int x2, int y2, int color, int style);
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void gfx_circle(int cx, int cy, int r, int color, double start, double end, double aspect);
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void gfx_paint(int x, int y, int fill_color, int border_color);
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void gfx_draw(const char *cmd);
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void gfx_flush(void);
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/* Current drawing state */
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void gfx_set_color(int c);
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int gfx_get_color(void);
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void gfx_get_last(int *x, int *y);
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void gfx_set_last(int x, int y);
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int gfx_get_width(void);
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int gfx_get_height(void);
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/* LINE style constants */
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#define GFX_LINE 0
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#define GFX_BOX 'B'
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#define GFX_BOXF 'F'
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/* GET/PUT sprite support */
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#include <stdint.h>
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/* PUT action modes */
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#define GFX_ACTION_XOR 0
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#define GFX_ACTION_PSET 1
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#define GFX_ACTION_PRESET 2
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#define GFX_ACTION_AND 3
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#define GFX_ACTION_OR 4
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/* Capture screen rectangle into int16 array. Returns required array size. */
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int gfx_sprite_get(int x1, int y1, int x2, int y2, int16_t *buf, int bufsize);
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/* Blit sprite from int16 array to screen. */
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void gfx_sprite_put(int x, int y, const int16_t *buf, int bufsize, int action);
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/* Calculate required array element count for a sprite rectangle. */
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int gfx_sprite_size(int x1, int y1, int x2, int y2);
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/* VIEW / WINDOW / PALETTE */
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void gfx_view(bool screen_flag, int x1, int y1, int x2, int y2,
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int fill, bool has_fill, int border, bool has_border);
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void gfx_view_reset(void);
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void gfx_window(bool screen_flag, double x1, double y1, double x2, double y2);
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void gfx_window_reset(void);
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void gfx_palette_set(int attr, int color);
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void gfx_palette_reset(void);
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/* Coordinate mapping (logical ↔ physical) */
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int gfx_map_x(double x);
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int gfx_map_y(double y);
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double gfx_pmap(double coord, int func);
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bool gfx_has_window(void);
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/* CGA framebuffer PEEK/POKE (segment 0xB800 in graphics mode) */
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uint8_t gfx_cga_peek(uint16_t offset);
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void gfx_cga_poke(uint16_t offset, uint8_t val);
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#endif
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