mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-27 10:38:46 -04:00
Matthew Stanley
ac0814c913
User-validated on Tomba: world, characters and HUD all present at native proportions on the 16:9 stretch. Mechanism (all parameterized via game.toml [widescreen], inert by default and at 4:3): - recompiler: [widescreen] sprite_tag_funcs emits a psx_ws_sprite_tag(cpu) callback at the entry of each listed function (the game engine's shared per-prim helper). The runtime records prim pointer ($a0) -> GTE-projected anchor (read from sprite_anchor_addr scratchpad) in a frame-stamped hash. - gpu.c: at GP0 execution, prims whose guest address (from the DMA linked-list walk's source tracking) is tagged get every X re-squashed around their own anchor — undoing the present stretch for CPU-computed pixel offsets the GTE squash never saw. Covers POLY_FT4 billboards and SPRT parts; SPRT texels keep full coverage via gr_draw_textured_rect_scaled. - hud_sprt_squash: untagged textured rects (SPRT family — pure screen-space 2D: HUD, menus) center-squash around the display centre. Untextured TILEs (fades) untouched. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
104 lines
4.1 KiB
C
104 lines
4.1 KiB
C
/* gpu.h — PS1 GPU hardware simulation (Phase 3).
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*
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* Implements GPUSTAT, GP0, GP1, and 1024x512 16-bit VRAM.
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* No rendering to screen — just correct hardware state transitions.
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*/
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#ifndef PSXRECOMP_GPU_H
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#define PSXRECOMP_GPU_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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void gpu_init(void);
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uint32_t gpu_read_gpustat(void); /* 0x1F801814 read */
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uint32_t gpu_read_gpuread(void); /* 0x1F801810 read */
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void gpu_write_gp0(uint32_t val); /* 0x1F801810 write */
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void gpu_write_gp1(uint32_t val); /* 0x1F801814 write */
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void gpu_set_gp0_source(uint32_t addr); /* diagnostic source for next GP0 word */
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void gpu_vblank_tick(void); /* Toggle LCF, called at each simulated vblank */
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/* Display presentation accessors (Phase 3). */
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const uint16_t* gpu_get_vram(void); /* Pointer to 1024x512 16-bit VRAM */
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typedef struct {
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uint32_t display_x, display_y; /* VRAM start of display area (GP1(05h)) */
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uint32_t width, height; /* Derived from display mode + ranges */
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int depth24; /* GP1(08h) display depth flag: RGB888 scanout */
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int disabled; /* GP1(03h) display disable flag */
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} GpuDisplayInfo;
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void gpu_get_display_info(GpuDisplayInfo* out);
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void gpu_display_pixel_rgb(const GpuDisplayInfo* di, uint32_t x, uint32_t y,
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uint8_t* r, uint8_t* g, uint8_t* b);
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uint32_t gpu_display_pixel_argb(const GpuDisplayInfo* di, uint32_t x, uint32_t y);
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uint64_t gpu_get_gp0_count(void); /* Total GP0 writes since init */
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void gpu_get_gp0_stats(uint64_t* nop, uint64_t* fill, uint64_t* draw, uint64_t* env, uint64_t* copy);
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typedef struct {
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uint32_t left, top, right, bottom;
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int32_t offset_x, offset_y;
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} GpuDrawArea;
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void gpu_get_draw_area(GpuDrawArea* out);
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uint16_t gpu_vram_peek(int x, int y);
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/* Shaded quad vertex capture (Phase 4.5 debug). */
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typedef struct {
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int32_t vx[4], vy[4];
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uint32_t color[4];
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} GpuSqCapEntry;
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void gpu_arm_shaded_quad_capture(void);
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int gpu_get_shaded_quad_capture(const GpuSqCapEntry** out);
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/* Per-frame GP0 command ring (always-on; query via debug server).
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* Each entry records the GP0 command header + up to 6 payload words
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* (longer commands like 0x3C shaded textured quad are truncated to 6).
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* Stamped with the s_frame_count value at issue time so a debug
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* client can pull all commands for any frame in the ring window. */
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#define GPU_GP0_RING_MAX_WORDS 12
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typedef struct {
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uint32_t frame;
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uint32_t seq;
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uint32_t src_addr; /* RAM/MMIO source address of command header, if known */
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uint32_t pc; /* g_debug_last_store_pc when command completes */
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uint8_t opcode;
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uint8_t n_words; /* total command length; >MAX means truncated */
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uint16_t pad;
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uint32_t cmd[GPU_GP0_RING_MAX_WORDS];
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} GpuGp0RingEntry;
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uint64_t gpu_gp0_ring_total(void);
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uint32_t gpu_gp0_ring_capacity(void);
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uint32_t gpu_gp0_ring_max_words(void);
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int gpu_gp0_ring_dump_frame(uint32_t frame, GpuGp0RingEntry *out, int max_out);
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void gpu_gp0_ring_frame_span(uint32_t *out_oldest, uint32_t *out_newest);
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/* Vblank presentation callback — called from gpu_vblank_tick(). */
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typedef void (*gpu_vblank_cb)(void);
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void gpu_set_vblank_callback(gpu_vblank_cb cb);
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/* Present-time screen-colour model (see color_lut.h ScreenKind: 0=raw,
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* 1=crt, 2=composite, 3=trinitron). Config/launcher-driven; the PSX_SCREEN
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* env var, if set, overrides this. Default 0 (raw) is byte-identical. */
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void gpu_set_screen_kind(int kind);
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/* Widescreen proportion correction (active only when aspect != 4:3 and the
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* game's [widescreen] block opts in — see config_loader.h). Tagged
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* character/billboard prims are re-squashed around their projected anchor;
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* untagged SPRT prims (screen-space HUD/menus) around the display centre.
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* psx_ws_sprite_tag is the per-prim callback the recompiler emits at the
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* entry of each [widescreen] sprite_tag_funcs function. */
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void gpu_ws_configure(int aspect_num, int aspect_den,
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uint32_t sprite_anchor_addr, int hud_sprt_squash);
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struct CPUState;
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void psx_ws_sprite_tag(struct CPUState* cpu);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PSXRECOMP_GPU_H */
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