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Merge commit 'a22ac9e1c8e7b1cd78aa197bf1727a9f97f74b5e' into dev

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This commit is contained in:
SimoneN64
2024-09-22 15:30:30 +02:00
parent 854bf69eb2 a22ac9e1c8
commit 8f1586b493
60 changed files with 2597 additions and 1126 deletions
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12
external/SDL/examples/CMakeLists.txt vendored
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@@ -120,8 +120,16 @@ macro(add_sdl_example_executable TARGET)
target_include_directories(${TARGET} PRIVATE "$<TARGET_PROPERTY:SDL3::${sdl_name_component},INCLUDE_DIRECTORIES>")
endmacro()
add_sdl_example_executable(renderer-clear SOURCES renderer/01-clear/renderer-clear.c)
add_sdl_example_executable(renderer-primitives SOURCES renderer/02-primitives/renderer-primitives.c)
add_sdl_example_executable(renderer-clear SOURCES renderer/01-clear/clear.c)
add_sdl_example_executable(renderer-primitives SOURCES renderer/02-primitives/primitives.c)
add_sdl_example_executable(renderer-lines SOURCES renderer/03-lines/lines.c)
add_sdl_example_executable(renderer-points SOURCES renderer/04-points/points.c)
add_sdl_example_executable(renderer-rectangles SOURCES renderer/05-rectangles/rectangles.c)
add_sdl_example_executable(renderer-textures SOURCES renderer/06-textures/textures.c DATAFILES ${CMAKE_CURRENT_SOURCE_DIR}/../test/sample.bmp)
add_sdl_example_executable(renderer-streaming-textures SOURCES renderer/07-streaming-textures/streaming-textures.c)
add_sdl_example_executable(renderer-rotating-textures SOURCES renderer/08-rotating-textures/rotating-textures.c DATAFILES ${CMAKE_CURRENT_SOURCE_DIR}/../test/sample.bmp)
add_sdl_example_executable(renderer-scaling-textures SOURCES renderer/09-scaling-textures/scaling-textures.c DATAFILES ${CMAKE_CURRENT_SOURCE_DIR}/../test/sample.bmp)
add_sdl_example_executable(renderer-geometry SOURCES renderer/10-geometry/geometry.c DATAFILES ${CMAKE_CURRENT_SOURCE_DIR}/../test/sample.bmp)
add_sdl_example_executable(audio-simple-playback SOURCES audio/01-simple-playback/simple-playback.c)
add_sdl_example_executable(audio-simple-playback-callback SOURCES audio/02-simple-playback-callback/simple-playback-callback.c)
add_sdl_example_executable(audio-load-wav SOURCES audio/03-load-wav/load-wav.c DATAFILES ${CMAKE_CURRENT_SOURCE_DIR}/../test/sample.wav)

0
external/SDL/examples/renderer/01-clear/renderer-clear.c → external/SDL/examples/renderer/01-clear/clear.c vendored
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4
external/SDL/examples/renderer/02-primitives/README.txt vendored
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@@ -1,3 +1,7 @@
This example creates an SDL window and renderer, and then draws some lines,
rectangles and points to it every frame.
This is just a quick overview of simple drawing primitives; futher examples
will explore them in more detail.

0
external/SDL/examples/renderer/02-primitives/renderer-primitives.c → external/SDL/examples/renderer/02-primitives/primitives.c vendored
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3
external/SDL/examples/renderer/03-lines/README.txt vendored Normal file
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@@ -0,0 +1,3 @@
This example creates an SDL window and renderer, and then draws a something
roughly like a Christmas tree with nothing but lines, every frame.

93
external/SDL/examples/renderer/03-lines/lines.c vendored Normal file
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@@ -0,0 +1,93 @@
/*
* This example creates an SDL window and renderer, and then draws some lines
* to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/lines", 640, 480, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_srand(0); /* seed the random number generator */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
int i;
/* Lines (line segments, really) are drawn in terms of points: a set of
X and Y coordinates, one set for each end of the line.
(0, 0) is the top left of the window, and larger numbers go down
and to the right. This isn't how geometry works, but this is pretty
standard in 2D graphics. */
static const SDL_FPoint line_points[] = {
{ 100, 354 }, { 220, 230 }, { 140, 230 }, { 320, 100 }, { 500, 230 },
{ 420, 230 }, { 540, 354 }, { 400, 354 }, { 100, 354 }
};
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 100, 100, 100, 255); /* grey, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* You can draw lines, one at a time, like these brown ones... */
SDL_SetRenderDrawColor(renderer, 127, 49, 32, 255);
SDL_RenderLine(renderer, 240, 450, 400, 450);
SDL_RenderLine(renderer, 240, 356, 400, 356);
SDL_RenderLine(renderer, 240, 356, 240, 450);
SDL_RenderLine(renderer, 400, 356, 400, 450);
/* You can also draw a series of connected lines in a single batch... */
SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
SDL_RenderLines(renderer, line_points, SDL_arraysize(line_points));
/* here's a bunch of lines drawn out from a center point in a circle. */
/* we randomize the color of each line, so it functions as animation. */
for (i = 0; i < 360; i++) {
const float size = 30.0f;
const float x = 320.0f;
const float y = 95.0f - (size / 2.0f);
SDL_SetRenderDrawColor(renderer, SDL_rand(256), SDL_rand(256), SDL_rand(256), 255);
SDL_RenderLine(renderer, x, y, x + SDL_sinf((float) i) * size, y + SDL_cosf((float) i) * size);
}
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
/* SDL will clean up the window/renderer for us. */
}

3
external/SDL/examples/renderer/04-points/README.txt vendored Normal file
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@@ -0,0 +1,3 @@
This example creates an SDL window and renderer, and then draws a bunch of
single points, moving across the screen.

118
external/SDL/examples/renderer/04-points/points.c vendored Normal file
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@@ -0,0 +1,118 @@
/*
* This example creates an SDL window and renderer, and then draws some points
* to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static Uint64 last_time = 0;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
#define NUM_POINTS 500
#define MIN_PIXELS_PER_SECOND 30 /* move at least this many pixels per second. */
#define MAX_PIXELS_PER_SECOND 60 /* move this many pixels per second at most. */
/* (track everything as parallel arrays instead of a array of structs,
so we can pass the coordinates to the renderer in a single function call.) */
/* Points are plotted as a set of X and Y coordinates.
(0, 0) is the top left of the window, and larger numbers go down
and to the right. This isn't how geometry works, but this is pretty
standard in 2D graphics. */
static SDL_FPoint points[NUM_POINTS];
static float point_speeds[NUM_POINTS];
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
int i;
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/points", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_srand(0); /* seed the random number generator */
/* set up the data for a bunch of points. */
for (i = 0; i < SDL_arraysize(points); i++) {
points[i].x = SDL_randf() * ((float) WINDOW_WIDTH);
points[i].y = SDL_randf() * ((float) WINDOW_HEIGHT);
point_speeds[i] = MIN_PIXELS_PER_SECOND + (SDL_randf() * (MAX_PIXELS_PER_SECOND - MIN_PIXELS_PER_SECOND));
}
last_time = SDL_GetTicks();
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
const Uint64 now = SDL_GetTicks();
const float elapsed = ((float) (now - last_time)) / 1000.0f; /* seconds since last iteration */
int i;
/* let's move all our points a little for a new frame. */
for (i = 0; i < SDL_arraysize(points); i++) {
const float distance = elapsed * point_speeds[i];
points[i].x += distance;
points[i].y += distance;
if ((points[i].x >= WINDOW_WIDTH) || (points[i].y >= WINDOW_HEIGHT)) {
/* off the screen; restart it elsewhere! */
if (SDL_rand(2)) {
points[i].x = SDL_randf() * ((float) WINDOW_WIDTH);
points[i].y = 0.0f;
} else {
points[i].x = 0.0f;
points[i].y = SDL_randf() * ((float) WINDOW_HEIGHT);
}
point_speeds[i] = MIN_PIXELS_PER_SECOND + (SDL_randf() * (MAX_PIXELS_PER_SECOND - MIN_PIXELS_PER_SECOND));
}
}
last_time = now;
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); /* white, full alpha */
SDL_RenderPoints(renderer, points, SDL_arraysize(points)); /* draw all the points! */
/* You can also draw single points with SDL_RenderPoint(), but it's
cheaper (sometimes significantly so) to do them all at once. */
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
/* SDL will clean up the window/renderer for us. */
}

3
external/SDL/examples/renderer/05-rectangles/README.txt vendored Normal file
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@@ -0,0 +1,3 @@
This example creates an SDL window and renderer, and then draws a few
rectangles that change size each frame.

110
external/SDL/examples/renderer/05-rectangles/rectangles.c vendored Normal file
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@@ -0,0 +1,110 @@
/*
* This example creates an SDL window and renderer, and then draws some
* rectangles to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/rectangles", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
SDL_FRect rects[16];
const Uint64 now = SDL_GetTicks();
int i;
/* we'll have the rectangles grow and shrink over a few seconds. */
const float direction = ((now % 2000) >= 1000) ? 1.0f : -1.0f;
const float scale = ((float) (((int) (now % 1000)) - 500) / 500.0f) * direction;
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* Rectangles are comprised of set of X and Y coordinates, plus width and
height. (0, 0) is the top left of the window, and larger numbers go
down and to the right. This isn't how geometry works, but this is
pretty standard in 2D graphics. */
/* Let's draw a single rectangle (square, really). */
rects[0].x = rects[0].y = 100;
rects[0].w = rects[0].h = 100 + (100 * scale);
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255); /* red, full alpha */
SDL_RenderRect(renderer, &rects[0]);
/* Now let's draw several rectangles with one function call. */
for (i = 0; i < 3; i++) {
const float size = (i+1) * 50.0f;
rects[i].w = rects[i].h = size + (size * scale);
rects[i].x = (WINDOW_WIDTH - rects[i].w) / 2; /* center it. */
rects[i].y = (WINDOW_HEIGHT - rects[i].h) / 2; /* center it. */
}
SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255); /* green, full alpha */
SDL_RenderRects(renderer, rects, 3); /* draw three rectangles at once */
/* those were rectangle _outlines_, really. You can also draw _filled_ rectangles! */
rects[0].x = 400;
rects[0].y = 50;
rects[0].w = 100 + (100 * scale);
rects[0].h = 50 + (50 * scale);
SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255); /* blue, full alpha */
SDL_RenderFillRect(renderer, &rects[0]);
/* ...and also fill a bunch of rectangles at once... */
for (i = 0; i < SDL_arraysize(rects); i++) {
const float w = (float) (WINDOW_WIDTH / SDL_arraysize(rects));
const float h = i * 8.0f;
rects[i].x = i * w;
rects[i].y = WINDOW_HEIGHT - h;
rects[i].w = w;
rects[i].h = h;
}
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); /* white, full alpha */
SDL_RenderFillRects(renderer, rects, SDL_arraysize(rects));
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
/* SDL will clean up the window/renderer for us. */
}

3
external/SDL/examples/renderer/06-textures/README.txt vendored Normal file
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@@ -0,0 +1,3 @@
This example creates an SDL window and renderer, loads a texture from a
.bmp file, and then draws it a few times each frame.

125
external/SDL/examples/renderer/06-textures/textures.c vendored Normal file
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@@ -0,0 +1,125 @@
/*
* This example creates an SDL window and renderer, and then draws some
* textures to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *texture = NULL;
static int texture_width = 0;
static int texture_height = 0;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
SDL_Surface *surface = NULL;
char *bmp_path = NULL;
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/textures", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
/* Textures are pixel data that we upload to the video hardware for fast drawing. Lots of 2D
engines refer to these as "sprites." We'll do a static texture (upload once, draw many
times) with data from a bitmap file. */
/* SDL_Surface is pixel data the CPU can access. SDL_Texture is pixel data the GPU can access.
Load a .bmp into a surface, move it to a texture from there. */
SDL_asprintf(&bmp_path, "%ssample.bmp", SDL_GetBasePath()); /* allocate a string of the full file path */
surface = SDL_LoadBMP(bmp_path);
if (!surface) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't load bitmap!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_free(bmp_path); /* done with this, the file is loaded. */
texture_width = surface->w;
texture_height = surface->h;
texture = SDL_CreateTextureFromSurface(renderer, surface);
if (!texture) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create static texture!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_DestroySurface(surface); /* done with this, the texture has a copy of the pixels now. */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
SDL_FRect dst_rect;
const Uint64 now = SDL_GetTicks();
/* we'll have some textures move around over a few seconds. */
const float direction = ((now % 2000) >= 1000) ? 1.0f : -1.0f;
const float scale = ((float) (((int) (now % 1000)) - 500) / 500.0f) * direction;
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* Just draw the static texture a few times. You can think of it like a
stamp, there isn't a limit to the number of times you can draw with it. */
/* top left */
dst_rect.x = (100.0f * scale);
dst_rect.y = 0.0f;
dst_rect.w = (float) texture_width;
dst_rect.h = (float) texture_height;
SDL_RenderTexture(renderer, texture, NULL, &dst_rect);
/* center this one. */
dst_rect.x = ((float) (WINDOW_WIDTH - texture_width)) / 2.0f;
dst_rect.y = ((float) (WINDOW_HEIGHT - texture_height)) / 2.0f;
dst_rect.w = (float) texture_width;
dst_rect.h = (float) texture_height;
SDL_RenderTexture(renderer, texture, NULL, &dst_rect);
/* bottom right. */
dst_rect.x = ((float) (WINDOW_WIDTH - texture_width)) - (100.0f * scale);
dst_rect.y = (float) (WINDOW_HEIGHT - texture_height);
dst_rect.w = (float) texture_width;
dst_rect.h = (float) texture_height;
SDL_RenderTexture(renderer, texture, NULL, &dst_rect);
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
SDL_DestroyTexture(texture);
/* SDL will clean up the window/renderer for us. */
}

3
external/SDL/examples/renderer/07-streaming-textures/README.txt vendored Normal file
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@@ -0,0 +1,3 @@
This example creates an SDL window and renderer, then a streaming texture that
it will update every frame before drawing it to the screen.

107
external/SDL/examples/renderer/07-streaming-textures/streaming-textures.c vendored Normal file
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@@ -0,0 +1,107 @@
/*
* This example creates an SDL window and renderer, and then draws a streaming
* texture to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *texture = NULL;
#define TEXTURE_SIZE 150
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/streaming-textures", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, TEXTURE_SIZE, TEXTURE_SIZE);
if (!texture) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create streaming texture!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
SDL_FRect dst_rect;
const Uint64 now = SDL_GetTicks();
SDL_Surface *surface = NULL;
/* we'll have some color move around over a few seconds. */
const float direction = ((now % 2000) >= 1000) ? 1.0f : -1.0f;
const float scale = ((float) (((int) (now % 1000)) - 500) / 500.0f) * direction;
/* To update a streaming texture, you need to lock it first. This gets you access to the pixels.
Note that this is considered a _write-only_ operation: the buffer you get from locking
might not acutally have the existing contents of the texture, and you have to write to every
locked pixel! */
/* You can use SDL_LockTexture() to get an array of raw pixels, but we're going to use
SDL_LockTextureToSurface() here, because it wraps that array in a temporary SDL_Surface,
letting us use the surface drawing functions instead of lighting up individual pixels. */
if (SDL_LockTextureToSurface(texture, NULL, &surface)) {
SDL_Rect r;
SDL_FillSurfaceRect(surface, NULL, SDL_MapRGB(SDL_GetPixelFormatDetails(surface->format), NULL, 0, 0, 0)); /* make the whole surface black */
r.w = TEXTURE_SIZE;
r.h = TEXTURE_SIZE / 10;
r.x = 0;
r.y = (int) (((float) (TEXTURE_SIZE - r.h)) * ((scale + 1.0f) / 2.0f));
SDL_FillSurfaceRect(surface, &r, SDL_MapRGB(SDL_GetPixelFormatDetails(surface->format), NULL, 0, 255, 0)); /* make a strip of the surface green */
SDL_UnlockTexture(texture); /* upload the changes (and frees the temporary surface)! */
}
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 66, 66, 66, 255); /* grey, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* Just draw the static texture a few times. You can think of it like a
stamp, there isn't a limit to the number of times you can draw with it. */
/* Center this one. It'll draw the latest version of the texture we drew while it was locked. */
dst_rect.x = ((float) (WINDOW_WIDTH - TEXTURE_SIZE)) / 2.0f;
dst_rect.y = ((float) (WINDOW_HEIGHT - TEXTURE_SIZE)) / 2.0f;
dst_rect.w = dst_rect.h = (float) TEXTURE_SIZE;
SDL_RenderTexture(renderer, texture, NULL, &dst_rect);
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
SDL_DestroyTexture(texture);
/* SDL will clean up the window/renderer for us. */
}

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external/SDL/examples/renderer/08-rotating-textures/README.txt vendored Normal file
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This example creates an SDL window and renderer, loads a texture from a .bmp
file, and then draws it, rotating around the center of the screen.

111
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/*
* This example creates an SDL window and renderer, and then draws some
* rotated textures to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *texture = NULL;
static int texture_width = 0;
static int texture_height = 0;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
SDL_Surface *surface = NULL;
char *bmp_path = NULL;
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/rotating-textures", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
/* Textures are pixel data that we upload to the video hardware for fast drawing. Lots of 2D
engines refer to these as "sprites." We'll do a static texture (upload once, draw many
times) with data from a bitmap file. */
/* SDL_Surface is pixel data the CPU can access. SDL_Texture is pixel data the GPU can access.
Load a .bmp into a surface, move it to a texture from there. */
SDL_asprintf(&bmp_path, "%ssample.bmp", SDL_GetBasePath()); /* allocate a string of the full file path */
surface = SDL_LoadBMP(bmp_path);
if (!surface) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't load bitmap!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_free(bmp_path); /* done with this, the file is loaded. */
texture_width = surface->w;
texture_height = surface->h;
texture = SDL_CreateTextureFromSurface(renderer, surface);
if (!texture) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create static texture!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_DestroySurface(surface); /* done with this, the texture has a copy of the pixels now. */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
SDL_FPoint center;
SDL_FRect dst_rect;
const Uint64 now = SDL_GetTicks();
/* we'll have a texture rotate around over 2 seconds (2000 milliseconds). 360 degrees in a circle! */
const float rotation = (((float) ((int) (now % 2000))) / 2000.0f) * 360.0f;
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* Center this one, and draw it with some rotation so it spins! */
dst_rect.x = ((float) (WINDOW_WIDTH - texture_width)) / 2.0f;
dst_rect.y = ((float) (WINDOW_HEIGHT - texture_height)) / 2.0f;
dst_rect.w = (float) texture_width;
dst_rect.h = (float) texture_height;
/* rotate it around the center of the texture; you can rotate it from a different point, too! */
center.x = texture_width / 2.0f;
center.y = texture_height / 2.0f;
SDL_RenderTextureRotated(renderer, texture, NULL, &dst_rect, rotation, &center, SDL_FLIP_NONE);
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
SDL_DestroyTexture(texture);
/* SDL will clean up the window/renderer for us. */
}

3
external/SDL/examples/renderer/09-scaling-textures/README.txt vendored Normal file
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This example creates an SDL window and renderer, loads a texture from a .bmp
file, and then draws it, scaling it up and down.

108
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/*
* This example creates an SDL window and renderer, and then draws some
* textures to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *texture = NULL;
static int texture_width = 0;
static int texture_height = 0;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
SDL_Surface *surface = NULL;
char *bmp_path = NULL;
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/scaling-textures", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
/* Textures are pixel data that we upload to the video hardware for fast drawing. Lots of 2D
engines refer to these as "sprites." We'll do a static texture (upload once, draw many
times) with data from a bitmap file. */
/* SDL_Surface is pixel data the CPU can access. SDL_Texture is pixel data the GPU can access.
Load a .bmp into a surface, move it to a texture from there. */
SDL_asprintf(&bmp_path, "%ssample.bmp", SDL_GetBasePath()); /* allocate a string of the full file path */
surface = SDL_LoadBMP(bmp_path);
if (!surface) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't load bitmap!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_free(bmp_path); /* done with this, the file is loaded. */
texture_width = surface->w;
texture_height = surface->h;
texture = SDL_CreateTextureFromSurface(renderer, surface);
if (!texture) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create static texture!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_DestroySurface(surface); /* done with this, the texture has a copy of the pixels now. */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
SDL_FRect dst_rect;
const Uint64 now = SDL_GetTicks();
/* we'll have the texture grow and shrink over a few seconds. */
const float direction = ((now % 2000) >= 1000) ? 1.0f : -1.0f;
const float scale = ((float) (((int) (now % 1000)) - 500) / 500.0f) * direction;
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* center this one and make it grow and shrink. */
dst_rect.w = (float) texture_width + (texture_width * scale);
dst_rect.h = (float) texture_height + (texture_height * scale);
dst_rect.x = ((float) (WINDOW_WIDTH - dst_rect.w)) / 2.0f;
dst_rect.y = ((float) (WINDOW_HEIGHT - dst_rect.h)) / 2.0f;
SDL_RenderTexture(renderer, texture, NULL, &dst_rect);
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
SDL_DestroyTexture(texture);
/* SDL will clean up the window/renderer for us. */
}

3
external/SDL/examples/renderer/10-geometry/README.txt vendored Normal file
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This example creates an SDL window and renderer, loads a texture from a .bmp
file, and then draws geometry (arbitrary polygons) using it.

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/*
* This example creates an SDL window and renderer, and then draws some
* geometry (arbitrary polygons) to it every frame.
*
* This code is public domain. Feel free to use it for any purpose!
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
/* We will use this renderer to draw into this window every frame. */
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *texture = NULL;
static int texture_width = 0;
static int texture_height = 0;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
{
SDL_Surface *surface = NULL;
char *bmp_path = NULL;
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't initialize SDL!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
if (!SDL_CreateWindowAndRenderer("examples/renderer/geometry", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer)) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create window/renderer!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
/* Textures are pixel data that we upload to the video hardware for fast drawing. Lots of 2D
engines refer to these as "sprites." We'll do a static texture (upload once, draw many
times) with data from a bitmap file. */
/* SDL_Surface is pixel data the CPU can access. SDL_Texture is pixel data the GPU can access.
Load a .bmp into a surface, move it to a texture from there. */
SDL_asprintf(&bmp_path, "%ssample.bmp", SDL_GetBasePath()); /* allocate a string of the full file path */
surface = SDL_LoadBMP(bmp_path);
if (!surface) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't load bitmap!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_free(bmp_path); /* done with this, the file is loaded. */
texture_width = surface->w;
texture_height = surface->h;
texture = SDL_CreateTextureFromSurface(renderer, surface);
if (!texture) {
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Couldn't create static texture!", SDL_GetError(), NULL);
return SDL_APP_FAILURE;
}
SDL_DestroySurface(surface); /* done with this, the texture has a copy of the pixels now. */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
{
if (event->type == SDL_EVENT_QUIT) {
return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
}
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate)
{
const Uint64 now = SDL_GetTicks();
/* we'll have the triangle grow and shrink over a few seconds. */
const float direction = ((now % 2000) >= 1000) ? 1.0f : -1.0f;
const float scale = ((float) (((int) (now % 1000)) - 500) / 500.0f) * direction;
const float size = 200.0f + (200.0f * scale);
SDL_Vertex vertices[4];
int i;
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); /* black, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* Draw a single triangle with a different color at each vertex. Center this one and make it grow and shrink. */
/* You always draw triangles with this, but you can string triangles together to form polygons. */
SDL_zeroa(vertices);
vertices[0].position.x = ((float) WINDOW_WIDTH) / 2.0f;
vertices[0].position.y = (((float) WINDOW_HEIGHT) - size) / 2.0f;
vertices[0].color.r = 1.0f;
vertices[0].color.a = 1.0f;
vertices[1].position.x = (((float) WINDOW_WIDTH) + size) / 2.0f;
vertices[1].position.y = (((float) WINDOW_HEIGHT) + size) / 2.0f;
vertices[1].color.g = 1.0f;
vertices[1].color.a = 1.0f;
vertices[2].position.x = (((float) WINDOW_WIDTH) - size) / 2.0f;
vertices[2].position.y = (((float) WINDOW_HEIGHT) + size) / 2.0f;
vertices[2].color.b = 1.0f;
vertices[2].color.a = 1.0f;
SDL_RenderGeometry(renderer, NULL, vertices, 3, NULL, 0);
/* you can also map a texture to the geometry! Texture coordinates go from 0.0f to 1.0f. That will be the location
in the texture bound to this vertex. */
SDL_zeroa(vertices);
vertices[0].position.x = 10.0f;
vertices[0].position.y = 10.0f;
vertices[0].color.r = vertices[0].color.g = vertices[0].color.b = vertices[0].color.a = 1.0f;
vertices[0].tex_coord.x = 0.0f;
vertices[0].tex_coord.y = 0.0f;
vertices[1].position.x = 150.0f;
vertices[1].position.y = 10.0f;
vertices[1].color.r = vertices[1].color.g = vertices[1].color.b = vertices[1].color.a = 1.0f;
vertices[1].tex_coord.x = 1.0f;
vertices[1].tex_coord.y = 0.0f;
vertices[2].position.x = 10.0f;
vertices[2].position.y = 150.0f;
vertices[2].color.r = vertices[2].color.g = vertices[2].color.b = vertices[2].color.a = 1.0f;
vertices[2].tex_coord.x = 0.0f;
vertices[2].tex_coord.y = 1.0f;
SDL_RenderGeometry(renderer, texture, vertices, 3, NULL, 0);
/* Did that only draw half of the texture? You can do multiple triangles sharing some vertices,
using indices, to get the whole thing on the screen: */
/* Let's just move this over so it doesn't overlap... */
for (i = 0; i < 3; i++) {
vertices[i].position.x += 450;
}
/* we need one more vertex, since the two triangles can share two of them. */
vertices[3].position.x = 600.0f;
vertices[3].position.y = 150.0f;
vertices[3].color.r = vertices[0].color.g = vertices[0].color.b = vertices[0].color.a = 1.0f;
vertices[3].tex_coord.x = 1.0f;
vertices[3].tex_coord.y = 1.0f;
/* And an index to tell it to reuse some of the vertices between triangles... */
{
/* 4 vertices, but 6 actual places they used. Indices need less bandwidth to transfer and can reorder vertices easily! */
const int indices[] = { 0, 1, 2, 1, 2, 3 };
SDL_RenderGeometry(renderer, texture, vertices, 4, indices, SDL_arraysize(indices));
}
SDL_RenderPresent(renderer); /* put it all on the screen! */
return SDL_APP_CONTINUE; /* carry on with the program! */
}
/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate)
{
SDL_DestroyTexture(texture);
/* SDL will clean up the window/renderer for us. */
}