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Document DrawFootprint

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This commit is contained in:
GriffinR 2023-05-09 22:04:26 -04:00
parent 1497719f8c
commit 8b37b4292a
2 changed files with 40 additions and 17 deletions
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17
include/gba/defines.h
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@ -64,14 +64,23 @@
#define ROM_HEADER_SIZE 0xC0 #define ROM_HEADER_SIZE 0xC0
// Dimensions of a tile in pixels
#define TILE_WIDTH 8
#define TILE_HEIGHT 8
// Dimensions of the GBA screen in pixels
#define DISPLAY_WIDTH 240 #define DISPLAY_WIDTH 240
#define DISPLAY_HEIGHT 160 #define DISPLAY_HEIGHT 160
#define DISPLAY_TILE_WIDTH (DISPLAY_WIDTH / 8) // Dimensions of the GBA screen in tiles
#define DISPLAY_TILE_HEIGHT (DISPLAY_HEIGHT / 8) #define DISPLAY_TILE_WIDTH (DISPLAY_WIDTH / TILE_WIDTH)
#define DISPLAY_TILE_HEIGHT (DISPLAY_HEIGHT / TILE_HEIGHT)
#define TILE_SIZE_4BPP 32 // Size of different tile formats in bytes
#define TILE_SIZE_8BPP 64 #define TILE_SIZE(bpp)((bpp) * TILE_WIDTH * TILE_HEIGHT / 8)
#define TILE_SIZE_1BPP TILE_SIZE(1) // 8
#define TILE_SIZE_4BPP TILE_SIZE(4) // 32
#define TILE_SIZE_8BPP TILE_SIZE(8) // 64
#define TILE_OFFSET_4BPP(n) ((n) * TILE_SIZE_4BPP) #define TILE_OFFSET_4BPP(n) ((n) * TILE_SIZE_4BPP)
#define TILE_OFFSET_8BPP(n) ((n) * TILE_SIZE_8BPP) #define TILE_OFFSET_8BPP(n) ((n) * TILE_SIZE_8BPP)

40
src/pokedex.c
View File

@ -93,6 +93,13 @@ enum
NAME_YZ, NAME_YZ,
}; };
enum {
WIN_INFO,
WIN_FOOTPRINT,
WIN_CRY_WAVE,
WIN_VU_METER,
};
// For scrolling search parameter // For scrolling search parameter
#define MAX_SEARCH_PARAM_ON_SCREEN 6 #define MAX_SEARCH_PARAM_ON_SCREEN 6
#define MAX_SEARCH_PARAM_CURSOR_POS (MAX_SEARCH_PARAM_ON_SCREEN - 1) #define MAX_SEARCH_PARAM_CURSOR_POS (MAX_SEARCH_PARAM_ON_SCREEN - 1)
@ -888,11 +895,6 @@ static const struct BgTemplate sInfoScreen_BgTemplate[] =
} }
}; };
#define WIN_INFO 0
#define WIN_FOOTPRINT 1
#define WIN_CRY_WAVE 2
#define WIN_VU_METER 3
static const struct WindowTemplate sInfoScreen_WindowTemplates[] = static const struct WindowTemplate sInfoScreen_WindowTemplates[] =
{ {
[WIN_INFO] = [WIN_INFO] =
@ -4570,26 +4572,38 @@ static void PrintDecimalNum(u8 windowId, u16 num, u8 left, u8 top)
PrintInfoSubMenuText(windowId, str, left, top); PrintInfoSubMenuText(windowId, str, left, top);
} }
// The footprints are drawn on WIN_FOOTPRINT, which uses BG palette 15 (loaded with graphics/text_window/message_box.gbapal)
// The footprint pixels are stored as 1BPP, and set to the below color index in this palette when converted to 4BPP.
#define FOOTPRINT_COLOR_IDX 2
#define NUM_FOOTPRINT_TILES 4
static void DrawFootprint(u8 windowId, u16 dexNum) static void DrawFootprint(u8 windowId, u16 dexNum)
{ {
u8 footprint[32 * 4]; u8 footprint4bpp[TILE_SIZE_4BPP * NUM_FOOTPRINT_TILES];
const u8 * footprintGfx = gMonFootprintTable[NationalPokedexNumToSpecies(dexNum)]; const u8 * footprintGfx = gMonFootprintTable[NationalPokedexNumToSpecies(dexNum)];
u16 tileIdx = 0; u16 tileIdx = 0;
u16 i, j; u16 i, j;
for (i = 0; i < 32; i++) for (i = 0; i < TILE_SIZE_1BPP * NUM_FOOTPRINT_TILES; i++)
{ {
u8 tile = footprintGfx[i]; u8 footprint1bpp = footprintGfx[i];
// Convert the 8 pixels in the above 1BPP byte to 4BPP.
// Each iteration creates one 4BPP byte (2 pixels),
// so we need 4 iterations to do all 8 pixels.
for (j = 0; j < 4; j++) for (j = 0; j < 4; j++)
{ {
u8 value = ((tile >> (2 * j)) & 1 ? 2 : 0); u8 tile = 0;
if (tile & (2 << (2 * j))) if (footprint1bpp & (1 << (2 * j)))
value |= 0x20; tile |= FOOTPRINT_COLOR_IDX; // Set pixel
footprint[tileIdx] = value; if (footprint1bpp & (2 << (2 * j)))
tile |= FOOTPRINT_COLOR_IDX << 4; // Set pixel
footprint4bpp[tileIdx] = tile;
tileIdx++; tileIdx++;
} }
} }
CopyToWindowPixelBuffer(windowId, footprint, sizeof(footprint), 0); CopyToWindowPixelBuffer(windowId, footprint4bpp, sizeof(footprint4bpp), 0);
} }
// Unused Ruby/Sapphire function. // Unused Ruby/Sapphire function.