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Added ImageRotate

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dane_madsen 2023-05-23 22:02:34 +10:00
parent bf69b38056
commit 3585081e10
9 changed files with 152 additions and 0 deletions
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1
examples/Makefile
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@ -453,6 +453,7 @@ TEXTURES = \
textures/textures_image_generation \
textures/textures_image_loading \
textures/textures_image_processing \
textures/textures_image_rotate \
textures/textures_image_text \
textures/textures_to_image \
textures/textures_raw_data \

79
examples/textures/textures_image_rotate.c Normal file
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@ -0,0 +1,79 @@
/*******************************************************************************************
*
* raylib [textures] example - Image Rotation
*
* Example originally created with raylib 1.0, last time updated with raylib 1.0
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
* Copyright (c) 2014-2023 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#define NUM_TEXTURES 3
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture loading and drawing");
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Image image45 = LoadImage("resources/raylib_logo.png");
Image image90 = LoadImage("resources/raylib_logo.png");
Image imageNeg90 = LoadImage("resources/raylib_logo.png");
ImageRotate(&image45, 45);
ImageRotate(&image90, 90);
ImageRotate(&imageNeg90, -90);
Texture2D textures[NUM_TEXTURES] = { 0 };
textures[0] = LoadTextureFromImage(image45);
textures[1] = LoadTextureFromImage(image90);
textures[2] = LoadTextureFromImage(imageNeg90);
int currentTexture = 0;
//---------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT) || IsKeyPressed(KEY_RIGHT))
{
currentTexture = (currentTexture + 1)%NUM_TEXTURES; // Cycle between the textures
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
DrawTexture(textures[currentTexture], screenWidth/2 - textures[currentTexture].width/2, screenHeight/2 - textures[currentTexture].height/2, WHITE);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
for (int i = 0; i < NUM_TEXTURES; i++) UnloadTexture(textures[i]);
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}

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examples/textures/textures_image_rotate.png Normal file
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4
parser/output/raylib_api.xml
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@ -1685,6 +1685,10 @@
<Function name="ImageFlipHorizontal" retType="void" paramCount="1" desc="Flip image horizontally">
<Param type="Image *" name="image" desc="" />
</Function>
<Function name="ImageRotate" retType="void" paramCount="2" desc="Rotate image by input angle in degrees (-359 to 359)">
<Param type="Image *" name="image" desc="" />
<Param type="int" name="degrees" desc="" />
</Function>
<Function name="ImageRotateCW" retType="void" paramCount="1" desc="Rotate image clockwise 90deg">
<Param type="Image *" name="image" desc="" />
</Function>

1
projects/Geany/raylib.c.tags
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@ -202,6 +202,7 @@ ImageDrawText|void|(Image *dst, Vector2 position, const char *text, int fontSize
ImageDrawTextEx|void|(Image *dst, Vector2 position, Font font, const char *text, float fontSize, float spacing, Color color);|
ImageFlipVertical|void|(Image *image);|
ImageFlipHorizontal|void|(Image *image);|
ImageRotate|void|(Image *image, int degrees);|
ImageRotateCW|void|(Image *image);|
ImageRotateCCW|void|(Image *image);|
ImageColorTint|void|(Image *image, Color color);|

6
projects/Notepad++/raylib_npp_parser/raylib_npp.xml
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@ -1570,6 +1570,12 @@
<Param name="Image *image" />
</Overload>
</KeyWord>
<KeyWord name="ImageRotate" func="yes">
<Overload retVal="void" descr="Rotate image by input angle in degrees (-359 to 359)">
<Param name="Image *image" />
<Param name="int degrees" />
</Overload>
</KeyWord>
<KeyWord name="ImageRotateCW" func="yes">
<Overload retVal="void" descr="Rotate image clockwise 90deg">
<Param name="Image *image" />

1
projects/Notepad++/raylib_npp_parser/raylib_to_parse.h
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@ -346,6 +346,7 @@ RLAPI void ImageMipmaps(Image *image);
RLAPI void ImageDither(Image *image, int rBpp, int gBpp, int bBpp, int aBpp); // Dither image data to 16bpp or lower (Floyd-Steinberg dithering)
RLAPI void ImageFlipVertical(Image *image); // Flip image vertically
RLAPI void ImageFlipHorizontal(Image *image); // Flip image horizontally
RLAPI void ImageRotate(Image *image, int degrees); // Rotate image by input angle in degrees (-359 to 359)
RLAPI void ImageRotateCW(Image *image); // Rotate image clockwise 90deg
RLAPI void ImageRotateCCW(Image *image); // Rotate image counter-clockwise 90deg
RLAPI void ImageColorTint(Image *image, Color color); // Modify image color: tint

1
src/raylib.h
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@ -1268,6 +1268,7 @@ RLAPI void ImageMipmaps(Image *image);
RLAPI void ImageDither(Image *image, int rBpp, int gBpp, int bBpp, int aBpp); // Dither image data to 16bpp or lower (Floyd-Steinberg dithering)
RLAPI void ImageFlipVertical(Image *image); // Flip image vertically
RLAPI void ImageFlipHorizontal(Image *image); // Flip image horizontally
RLAPI void ImageRotate(Image *image, int degrees); // Rotate image by input angle in degrees (-359 to 359)
RLAPI void ImageRotateCW(Image *image); // Rotate image clockwise 90deg
RLAPI void ImageRotateCCW(Image *image); // Rotate image counter-clockwise 90deg
RLAPI void ImageColorTint(Image *image, Color color); // Modify image color: tint

59
src/rtextures.c
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@ -2118,6 +2118,65 @@ void ImageFlipHorizontal(Image *image)
}
}
// Rotate image in degrees
void ImageRotate(Image *image, int degrees)
{
// Security check to avoid program crash
if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return;
if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level");
if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats");
else
{
double rad = degrees * PI / 180.0;
double sin_rad = sin(rad);
double cos_rad = cos(rad);
int new_width = abs(image->width * cos_rad) + abs(image->height * sin_rad);
int new_height = abs(image->height * cos_rad) + abs(image->width * sin_rad);
int bytesPerPixel = GetPixelDataSize(1, 1, image->format);
unsigned char *rotatedData = (unsigned char *)RL_CALLOC(new_width * new_height, bytesPerPixel);
for (int y = 0; y < new_height; y++)
{
for (int x = 0; x < new_width; x++)
{
double oldX = ((x - new_width / 2.0) * cos_rad + (y - new_height / 2.0) * sin_rad) + image->width / 2.0;
double oldY = ((y - new_height / 2.0) * cos_rad - (x - new_width / 2.0) * sin_rad) + image->height / 2.0;
if (oldX >= 0 && oldX < image->width && oldY >= 0 && oldY < image->height)
{
int x1 = (int)floor(oldX);
int y1 = (int)floor(oldY);
int x2 = MIN(x1 + 1, image->width - 1);
int y2 = MIN(y1 + 1, image->height - 1);
double px = oldX - x1;
double py = oldY - y1;
for (int i = 0; i < bytesPerPixel; i++)
{
double f1 = ((unsigned char *)image->data)[(y1 * image->width + x1) * bytesPerPixel + i];
double f2 = ((unsigned char *)image->data)[(y1 * image->width + x2) * bytesPerPixel + i];
double f3 = ((unsigned char *)image->data)[(y2 * image->width + x1) * bytesPerPixel + i];
double f4 = ((unsigned char *)image->data)[(y2 * image->width + x2) * bytesPerPixel + i];
double val = f1 * (1 - px) * (1 - py) + f2 * px * (1 - py) + f3 * (1 - px) * py + f4 * px * py;
rotatedData[(y * new_width + x) * bytesPerPixel + i] = (unsigned char)val;
}
}
}
}
RL_FREE(image->data);
image->data = rotatedData;
image->width = new_width;
image->height = new_height;
}
}
// Rotate image clockwise 90deg
void ImageRotateCW(Image *image)
{