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Fix: Resize callback won't fire and canvas_get_size would return wrong size.

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The canvas_get_size function now returns the number of visible pixels after scaling.
The canvas resize callback now fires after a window was created or updated.
This commit is contained in:
Marcel Hellkamp 2018-03-29 18:37:18 +02:00
parent 3221ab1841
commit 0090f518e9
2 changed files with 33 additions and 10 deletions
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39
pixelnuke/canvas.c
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@ -22,6 +22,8 @@ typedef struct CanvasLayer {
static int canvas_display = -1;
static unsigned int canvas_tex_size = 1024;
static int canvas_width=0;
static int canvas_height=0;
static GLFWwindow* canvas_win;
static CanvasLayer *canvas_base;
static CanvasLayer *canvas_overlay;
@ -32,6 +34,14 @@ void glfw_error_callback(int error, const char* description) {
printf("GLFW Error: %d %s", error, description);
}
static inline int min(int a, int b) {
return a < b ? a : b;
}
static inline int max(int a, int b) {
return a > b ? a : b;
}
// User callbacks
void (*canvas_on_close_cb)();
@ -95,6 +105,9 @@ static void canvas_on_key(GLFWwindow* window, int key, int scancode, int action,
}
static void canvas_on_resize(GLFWwindow* window, int w, int h) {
canvas_width = w;
canvas_height = h;
if(canvas_on_resize_cb)
(*canvas_on_resize_cb)();
}
@ -144,6 +157,9 @@ static void canvas_window_setup() {
glfwSetKeyCallback(canvas_win, &canvas_on_key);
glfwSetFramebufferSizeCallback(canvas_win, &canvas_on_resize);
glfwGetFramebufferSize(canvas_win, &canvas_width, &canvas_height);
canvas_on_resize(canvas_win, canvas_width, canvas_height);
canvas_do_layout = 0;
}
@ -237,19 +253,18 @@ static void* canvas_render_loop(void * arg) {
if (glfwWindowShouldClose(canvas_win))
break;
int w, h;
glfwGetFramebufferSize(canvas_win, &w, &h);
glfwGetFramebufferSize(canvas_win, &canvas_width, &canvas_height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, w, h, 0, -1, 1);
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
glOrtho(0, canvas_width, canvas_height, 0, -1, 1);
glViewport(0, 0, (GLsizei) canvas_width, (GLsizei) canvas_height);
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
GLuint texSize = canvas_base->size;
if(w > texSize || h > texSize) {
float scale = ((float) (w>h?w:h)) / (float) texSize;
if(canvas_width > texSize || canvas_height > texSize) {
float scale = ((float) max(canvas_width, canvas_height)) / (float) texSize;
glScalef(scale, scale, 1);
}
@ -372,8 +387,14 @@ void canvas_get_px(unsigned int x, unsigned int y, uint32_t *rgba) {
}
void canvas_get_size(unsigned int *w, unsigned int *h) {
// TODO: Clip on window size
*w = canvas_base->size;
*h = canvas_base->size;
int texSize = canvas_base->size;
if(canvas_width > texSize || canvas_height > texSize) {
float scale = ((float) max(canvas_width, canvas_height)) / texSize;
*w = min(texSize, canvas_width/scale);
*h = min(texSize, canvas_height/scale);
} else {
*w = canvas_width;
*h = canvas_height;
}
}