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Saturn: Rendering kinda works

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UnknownShadow200 2024-04-19 07:41:51 +10:00
parent c3878e3248
commit b2cb63a6e9
1 changed files with 100 additions and 50 deletions
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150
src/Graphics_Saturn.c
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@ -22,24 +22,20 @@
#define PRIMITIVE_DRAW_MODE_GOURAUD_HALF_TRANS (7)
#define PRIMITIVE_DRAW_MODE_COUNT (8)
#define PRIMITIVE_WIDTH 32
#define PRIMITIVE_HEIGHT 32
#define PRIMITIVE_HALF_WIDTH (PRIMITIVE_WIDTH / 2)
#define PRIMITIVE_HALF_HEIGHT (PRIMITIVE_HEIGHT / 2)
#define PRIMITIVE_COLOR RGB1555(1, 31, 0, 31)
#define ORDER_SYSTEM_CLIP_COORDS_INDEX 0
#define ORDER_LOCAL_COORDS_INDEX 1
#define ORDER_POLYGON_INDEX 2
#define ORDER_DRAW_END_INDEX 3
#define ORDER_COUNT 4
#define CMDS_COUNT 400
static PackedCol clear_color;
static vdp1_cmdt_list_t cmdt_list;
static vdp1_cmdt_t cmdts_all[ORDER_COUNT];
static vdp1_cmdt_t cmdts_all[CMDS_COUNT];
static int cmdts_count;
static vdp1_vram_partitions_t _vdp1_vram_partitions;
static vdp1_cmdt_t* NextPrimitive(void) {
if (cmdts_count >= CMDS_COUNT) Logger_Abort("Too many VDP1 commands");
return &cmdts_all[cmdts_count++];
}
static vdp1_cmdt_draw_mode_t _primitive_draw_mode = {
.raw = 0x0000
};
@ -61,42 +57,18 @@ static void UpdateVDP1Env(void) {
vdp1_env_set(&env);
}
static void _cmdt_list_init(void)
{
static const int16_vec2_t system_clip_coord = { SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1 };
memset(cmdts_all, 0x00, sizeof(vdp1_cmdt_t) * ORDER_COUNT);
cmdt_list.cmdts = cmdts_all;
cmdt_list.count = ORDER_COUNT;
vdp1_cmdt_t* cmd = &cmdts_all[ORDER_SYSTEM_CLIP_COORDS_INDEX];
vdp1_cmdt_system_clip_coord_set(cmd);
vdp1_cmdt_vtx_system_clip_coord_set(cmd, system_clip_coord);
vdp1_cmdt_end_set(&cmdts_all[ORDER_DRAW_END_INDEX]);
}
static void _primitive_init(void)
{
static const int16_vec2_t local_coord_center =
INT16_VEC2_INITIALIZER((SCREEN_WIDTH / 2) - PRIMITIVE_HALF_WIDTH - 1,
(SCREEN_HEIGHT / 2) - PRIMITIVE_HALF_HEIGHT - 1);
static void _primitive_init(void) {
_primitive.points[0].x = 0;
_primitive.points[0].y = PRIMITIVE_HEIGHT - 1;
_primitive.points[0].y = SCREEN_WIDTH - 1;
_primitive.points[1].x = PRIMITIVE_WIDTH - 1;
_primitive.points[1].y = PRIMITIVE_HEIGHT - 1;
_primitive.points[1].x = SCREEN_WIDTH - 1;
_primitive.points[1].y = SCREEN_HEIGHT - 1;
_primitive.points[2].x = PRIMITIVE_WIDTH - 1;
_primitive.points[2].x = SCREEN_HEIGHT - 1;
_primitive.points[2].y = 0;
_primitive.points[3].x = 0;
_primitive.points[3].y = 0;
vdp1_cmdt_t* cmd = &cmdts_all[ORDER_LOCAL_COORDS_INDEX];
vdp1_cmdt_local_coord_set(cmd);
vdp1_cmdt_vtx_local_coord_set(cmd, local_coord_center);
}
static GfxResourceID white_square;
@ -124,7 +96,6 @@ void Gfx_Create(void) {
vdp2_sprite_priority_set(0, 6);
UpdateVDP1Env();
_cmdt_list_init();
_primitive_init();
}
@ -333,16 +304,70 @@ void Gfx_DrawVb_Lines(int verticesCount) {
}
void Gfx_DrawVb_IndexedTris_Range(int verticesCount, int startVertex) {
static void Transform(Vec3* result, struct VertexTextured* a, const struct Matrix* mat) {
/* a could be pointing to result - therefore can't directly assign X/Y/Z */
float x = a->x * mat->row1.x + a->y * mat->row2.x + a->z * mat->row3.x + mat->row4.x;
float y = a->x * mat->row1.y + a->y * mat->row2.y + a->z * mat->row3.y + mat->row4.y;
float z = a->x * mat->row1.z + a->y * mat->row2.z + a->z * mat->row3.z + mat->row4.z;
float w = a->x * mat->row1.w + a->y * mat->row2.w + a->z * mat->row3.w + mat->row4.w;
result->x = (x/w) * (320/2);
result->y = (y/w) * -(224/2);
result->z = (z/w) * 1024;
}
#define IsPointCulled(vec) vec.x < -10000 || vec.x > 10000 || vec.y < -10000 || vec.y > 10000 || vec.z < 0 || vec.z > 1024
static void DrawTexturedQuads(int verticesCount, int startVertex) {
for (int i = 0; i < verticesCount; i += 4)
{
struct VertexTextured* v = (struct VertexTextured*)gfx_vertices + startVertex + i;
Vec3 coords[4];
Transform(&coords[0], &v[0], &mvp);
Transform(&coords[1], &v[1], &mvp);
Transform(&coords[2], &v[2], &mvp);
Transform(&coords[3], &v[3], &mvp);
int16_vec2_t points[4];
points[0].x = coords[0].x; points[0].y = coords[0].y;
points[1].x = coords[1].x; points[1].y = coords[1].y;
points[2].x = coords[2].x; points[2].y = coords[2].y;
points[3].x = coords[3].x; points[3].y = coords[3].y;
if (IsPointCulled(coords[0])) continue;
if (IsPointCulled(coords[1])) continue;
if (IsPointCulled(coords[2])) continue;
if (IsPointCulled(coords[3])) continue;
int R = PackedCol_R(v->Col);
int G = PackedCol_G(v->Col);
int B = PackedCol_B(v->Col);
vdp1_cmdt_t* cmd;
cmd = NextPrimitive();
vdp1_cmdt_polygon_set(cmd);
vdp1_cmdt_color_set(cmd, RGB1555(1, R >> 3, G >> 3, B >> 3));
vdp1_cmdt_draw_mode_set(cmd, _primitive_draw_mode);
vdp1_cmdt_vtx_set(cmd, points);
}
}
void Gfx_DrawVb_IndexedTris_Range(int verticesCount, int startVertex) {
if (gfx_format == VERTEX_FORMAT_TEXTURED) {
DrawTexturedQuads(verticesCount, startVertex);
}
}
void Gfx_DrawVb_IndexedTris(int verticesCount) {
if (gfx_format == VERTEX_FORMAT_TEXTURED) {
DrawTexturedQuads(verticesCount, 0);
}
}
void Gfx_DrawIndexedTris_T2fC4b(int verticesCount, int startVertex) {
DrawTexturedQuads(verticesCount, startVertex);
}
@ -359,19 +384,44 @@ cc_bool Gfx_WarnIfNecessary(void) {
void Gfx_BeginFrame(void) {
Platform_LogConst("FRAME BEG");
cmdts_count = 0;
static const int16_vec2_t system_clip_coord = { SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1 };
static const int16_vec2_t local_coord_center = { SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2 };
vdp1_cmdt_t* cmd;
cmd = NextPrimitive();
vdp1_cmdt_system_clip_coord_set(cmd);
vdp1_cmdt_vtx_system_clip_coord_set(cmd, system_clip_coord);
cmd = NextPrimitive();
vdp1_cmdt_local_coord_set(cmd);
vdp1_cmdt_vtx_local_coord_set(cmd, local_coord_center);
int R = PackedCol_R(clear_color);
int G = PackedCol_G(clear_color);
int B = PackedCol_B(clear_color);
cmd = NextPrimitive();
vdp1_cmdt_polygon_set(cmd);
vdp1_cmdt_color_set(cmd, RGB1555(1, R >> 3, G >> 3, B >> 3)); // TODO VDP1 erase
vdp1_cmdt_draw_mode_set(cmd, _primitive_draw_mode);
vdp1_cmdt_vtx_set(cmd, &_primitive.points[0]);
}
void Gfx_EndFrame(void) {
Platform_LogConst("FRAME END");
vdp1_cmdt_t* cmd;
cmd = &cmdts_all[ORDER_POLYGON_INDEX];
vdp1_cmdt_polygon_set(cmd);
vdp1_cmdt_color_set(cmd, PRIMITIVE_COLOR);
vdp1_cmdt_draw_mode_set(cmd, _primitive_draw_mode);
vdp1_cmdt_vtx_set(cmd, &_primitive.points[0]);
cmd = NextPrimitive();
vdp1_cmdt_end_set(cmd);
vdp1_cmdt_list_t cmdt_list;
cmdt_list.cmdts = cmdts_all;
cmdt_list.count = cmdts_count;
vdp1_sync_cmdt_list_put(&cmdt_list, 0);
vdp1_sync_render();
vdp1_sync();
vdp2_sync();