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Rework sprite API

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This commit is contained in:
Shylie 2024-05-19 21:46:56 -05:00
parent e3a65072d8
commit c89563338a
12 changed files with 8151 additions and 95 deletions
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1
.gitattributes vendored Normal file
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@ -0,0 +1 @@
*.png filter=lfs diff=lfs merge=lfs -text

41
examples/CMakeLists.txt
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@ -2,20 +2,37 @@ cmake_minimum_required(VERSION 3.28)
set(CMAKE_FOLDER examples)
add_executable(basic WIN32
basic.cpp
file(GLOB_RECURSE
EXAMPLE_RESOURCES
RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
CONFIGURE_DEPENDS
${CMAKE_CURRENT_SOURCE_DIR}/resources/**.png
)
target_link_libraries(basic
PRIVATE
glerminal
foreach(RESOURCE_FILE ${EXAMPLE_RESOURCES})
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_FILE}
COMMAND ${CMAKE_COMMAND} -E copy
${CMAKE_CURRENT_SOURCE_DIR}/${RESOURCE_FILE}
${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_FILE}
DEPENDS
${CMAKE_CURRENT_SOURCE_DIR}/${RESOURCE_FILE}
)
endforeach()
file(GLOB_RECURSE
EXAMPLE_SOURCES
RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
CONFIGURE_DEPENDS
${CMAKE_CURRENT_SOURCE_DIR}/*.cpp
)
add_executable(towers WIN32
towers.cpp
)
list(TRANSFORM EXAMPLE_RESOURCES PREPEND ${CMAKE_CURRENT_BINARY_DIR}/)
target_link_libraries(towers
PRIVATE
glerminal
)
foreach(SOURCE_FILE ${EXAMPLE_SOURCES})
get_filename_component(SOURCE_FILENAME ${SOURCE_FILE} NAME_WLE)
add_executable(${SOURCE_FILENAME} WIN32 ${SOURCE_FILE} ${EXAMPLE_RESOURCES})
target_link_libraries(${SOURCE_FILENAME} PRIVATE glerminal)
endforeach()

46
examples/atlas.cpp Normal file
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@ -0,0 +1,46 @@
#include <glerminal.h>
#include <cstdlib>
namespace
{
void init()
{
glerminal_load_sprites_file("resources/atlas.png");
}
void mainloop(float dt)
{
static float time = 1;
time += dt;
if (time < 1.0f)
{
return;
}
else
{
time = 0;
}
for (int i = 0; i < 40; i++)
{
for (int j = 0; j < 25; j++)
{
for (int k = 0; k < 256; k++)
{
glerminal_set(i, j, k, rand() % 4);
glerminal_offset(i, j, k, (rand() * rand()) % 64 - 32, (rand() * rand()) % 64 - 32);
}
}
}
glerminal_flush();
}
}
int main(int argc, char** argv)
{
glerminal_run(init, mainloop);
}

13
examples/basic.cpp
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@ -6,16 +6,7 @@ namespace
{
void init()
{
glerminal_update_sprite(1, {
0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00
});
glerminal_load_sprites_file("resources/basic.png");
}
void mainloop(float dt)
@ -39,7 +30,7 @@ namespace
{
for (int k = 0; k < 256; k++)
{
glerminal_set(i, j, k, rand() % 8 == 0);
glerminal_set(i, j, k, rand() % 3 == 0);
glerminal_offset(i, j, k, (rand() * rand()) % 64 - 32, (rand() * rand()) % 64 - 32);
}
}

3
examples/resources/atlas.png Normal file
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@ -0,0 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:93d9f6545bb2dc2dbb1fcc72875e104e7fa2bbeca6972dc133865dcfbf66e720
size 120

3
examples/resources/basic.png Normal file
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@ -0,0 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:56e82b6fd40c3d880d1683d59a6a52f5e7b188d199aed22f375189eb1735e3a2
size 120

3
examples/resources/towers.png Normal file
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@ -0,0 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:aba7635b3d53c74c5b177ddb02641a475664acc86344f884d350e61737d0f1ec
size 98

70
examples/towers.cpp
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@ -7,64 +7,48 @@ namespace
{
void init()
{
glerminal_update_sprite(1,
{
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
});
glerminal_load_sprites_file("resources/towers.png");
for (int i = 0; i < 256; i++)
{
constexpr unsigned char c = 32;
constexpr unsigned char c = 0;
const unsigned char v = (255 - c) * powf((i - 1) / 256.0f, 2.0f) + c;
const unsigned int j = (0xFF << 24) | (v << 16) | (v << 8) | v;
const unsigned int j = (0x7F << 24) | (v << 16) | (v << 8) | v;
glerminal_layer_color(i, j);
glerminal_layer_scale(i, i / 256.0f + 1);
}
}
void mainloop(float dt)
{
static float time = 1;
time += dt;
if (time < 0.15f)
{
return;
}
else
{
time = 0;
}
const int cx = rand() % 40;
const int cy = rand() % 25;
for (int i = 0; i < 40; i++)
{
for (int j = 0; j < 25; j++)
{
const int c = rand() % 224 + 32;
for (int k = 0; k < c; k++)
{
glerminal_set(i, j, k, 1);
}
}
}
}
void mainloop(float dt)
{
static float time = 0;
time += dt;
const float cx = 20.0f * cosf(time / 3.1415f) + 20.0f;
const float cy = 12.5f * sinf(time / 3.1415f) + 12.5f;
for (int i = 0; i < 40; i++)
{
for (int j = 0; j < 25; j++)
{
for (int k = 0; k < 256; k++)
{
if (k < c)
{
glerminal_set(i, j, k, 1);
const float ox = 0.01f * k * (i - cx);
const float oy = 0.01f * k * (j - cy);
glerminal_offset(i, j, k, ox + (1 + 0.004f * k) * cosf(c * i + k * 6.28f / 128.0f), oy + (1 + 0.004f * k) * sinf(c * j + k * 6.28f / 128.0f));
}
else
{
glerminal_set(i, j, k, 0);
}
const float ox = 0.01f * k * (i - cx);
const float oy = 0.01f * k * (j - cy);
glerminal_offset(i, j, k, ox + (1 + 0.004f * k) * cosf(i + k * 6.2832f / 128.0f + 3.1415f * time), oy + (1 + 0.004f * k) * sinf(j + k * 6.2832f / 128.0f + 3.1415f * time));
}
}
}

20
include/glerminal.h
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@ -6,20 +6,9 @@ extern "C"
{
#endif
enum
{
GLERMINAL_CELL_SIZE = 8,
GLERMINAL_CELL_AREA = GLERMINAL_CELL_SIZE * GLERMINAL_CELL_SIZE
};
typedef void (*glerminal_init_cb)();
typedef void (*glerminal_main_cb)(float dt);
typedef struct glerminal_sprite
{
unsigned int data[GLERMINAL_CELL_AREA];
} glerminal_sprite;
/**
* @brief Call init once, then run the application's mainloop
* @param init initialization callback
@ -71,12 +60,9 @@ void glerminal_layer_color(unsigned char layer, unsigned int color);
*/
void glerminal_layer_scale(unsigned char layer, float scale);
/**
* @brief Upload sprite to the given sprite ID
* @param id The ID of the sprite to change
* @param sprite The new sprite
*/
void glerminal_update_sprite(unsigned char id, glerminal_sprite sprite);
void glerminal_load_sprites_file(const char* filename);
void glerminal_load_sprites_buffer(unsigned char width, unsigned char height, const unsigned int* buffer);
#ifdef __cplusplus
}

12
source/glerminal-private.h
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@ -3,24 +3,23 @@
#include "glerminal.h"
#include <stb_image.h>
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <stdexcept>
#ifdef _DEBUG
#include <fstream>
#endif
#include <stdexcept>
namespace glerminal
{
constexpr unsigned int SCREEN_WIDTH = 1280;
constexpr unsigned int SCREEN_HEIGHT = 800;
constexpr unsigned int CELL_SIZE = GLERMINAL_CELL_SIZE;
constexpr unsigned int CELL_SIZE = 8;
constexpr unsigned int CELL_SCALE = 4;
constexpr unsigned int LAYER_COUNT = 256;
constexpr unsigned int GRID_WIDTH = SCREEN_WIDTH / (CELL_SIZE * CELL_SCALE);
constexpr unsigned int GRID_HEIGHT = SCREEN_HEIGHT / (CELL_SIZE * CELL_SCALE);
constexpr unsigned int GRID_AREA = GRID_WIDTH * GRID_HEIGHT;
constexpr unsigned int LAYER_COUNT = 256;
class glerminal
{
@ -43,8 +42,7 @@ namespace glerminal
void offset(unsigned char x, unsigned char y, unsigned char layer, float x_offset, float y_offset);
void layer_color(unsigned char layer, unsigned int color);
void layer_scale(unsigned char layer, float scale);
void update_sprite(unsigned char id, glerminal_sprite sprite);
void load_atlas(unsigned char w, unsigned char h, const unsigned int* data);
private:
// glfw data

49
source/glerminal.cpp
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@ -1,3 +1,6 @@
#define STB_IMAGE_IMPLEMENTATION
#define STBI_ONLY_PNG
#define STBI_MAX_DIMENSIONS 128
#include "glerminal-private.h"
#define GRID_SIZE_UNIFORM_NAME "grid_size"
@ -255,10 +258,26 @@ namespace glerminal
m_layer_scales[layer] = scale;
}
void glerminal::update_sprite(unsigned char id, glerminal_sprite sprite)
void glerminal::load_atlas(unsigned char w, unsigned char h, const unsigned int* data)
{
// does this work?
reinterpret_cast<glerminal_sprite*>(m_sprites)[id] = sprite;
// each row of the atlas
for (int j = 0; j < h; j++)
{
// each column of the atlas
for (int i = 0; i < w; i++)
{
// each row of the individual sprite
for (int k = 0; k < CELL_SIZE; k++)
{
// offset from base address in atlas layout
const unsigned int src_offset = i + k * w + j * w * CELL_SIZE;
// offset from base address in array layout
const unsigned int dst_offset = k + i * CELL_SIZE + j * w * CELL_SIZE;
memcpy(m_sprites + CELL_SIZE * dst_offset, data + CELL_SIZE * src_offset, CELL_SIZE * sizeof(unsigned int));
}
}
}
}
void glerminal::init_glfw()
@ -682,9 +701,29 @@ void glerminal_layer_scale(unsigned char layer, float scale)
GLERMINAL_G->layer_scale(layer, scale);
}
void glerminal_update_sprite(unsigned char id, glerminal_sprite sprite)
void glerminal_load_sprites_file(const char* filename)
{
if (!GLERMINAL_G) { return; }
GLERMINAL_G->update_sprite(id, sprite);
int w, h;
stbi_uc* const buffer = stbi_load(filename, &w, &h, nullptr, 4);
// verify atlas size is a multiple of CELL_SIZE in each dimension
if (w % glerminal::CELL_SIZE == 0 && h % glerminal::CELL_SIZE == 0)
{
GLERMINAL_G->load_atlas(w / glerminal::CELL_SIZE, h / glerminal::CELL_SIZE, reinterpret_cast<unsigned int*>(buffer));
}
stbi_image_free(buffer);
}
void glerminal_load_sprites_buffer(unsigned char width, unsigned char height, const unsigned int* buffer)
{
if (!GLERMINAL_G) { return; }
// verify atlas size is a multiple of CELL_SIZE in each dimension
if (width % glerminal::CELL_SIZE == 0 && height % glerminal::CELL_SIZE == 0)
{
GLERMINAL_G->load_atlas(width / glerminal::CELL_SIZE, height / glerminal::CELL_SIZE, buffer);
}
}

7985
source/stb_image.h Normal file
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