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54735dec84
The coding style has for a long time said to avoid using redundant glib
data types such as gint or gchar etc because we feel that they make the
code look unnecessarily foreign to developers coming from outside of the
Gnome developer community.
Note: When we tried to find the historical rationale for the types we
just found that they were apparently only added for consistent syntax
highlighting which didn't seem that compelling.
Up until now we have been continuing to use some of the platform
specific type such as gint{8,16,32,64} and gsize but this patch switches
us over to using the standard c99 equivalents instead so we can further
ensure that our code looks familiar to the widest range of C developers
who might potentially contribute to Cogl.
So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this
switches all Cogl code to instead use the int{8,16,32,64}_t and
uint{8,16,32,64}_t c99 types instead.
Instead of gsize we now use size_t
For now we are not going to use the c99 _Bool type and instead we have
introduced a new CoglBool type to use instead of gboolean.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
#include <cogl/cogl.h>
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#include <glib.h>
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#include <stdio.h>
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#include <SDL.h>
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/* This short example is just to demonstrate mixing SDL with Cogl as a
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simple way to get portable support for events */
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typedef struct Data
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{
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CoglPrimitive *triangle;
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CoglPipeline *pipeline;
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float center_x, center_y;
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CoglFramebuffer *fb;
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CoglBool quit;
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CoglBool redraw_queued;
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} Data;
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static CoglBool
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redraw (Data *data)
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{
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CoglFramebuffer *fb = data->fb;
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cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
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cogl_framebuffer_push_matrix (fb);
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cogl_framebuffer_translate (fb, data->center_x, -data->center_y, 0.0f);
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cogl_framebuffer_draw_primitive (fb, data->pipeline, data->triangle);
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cogl_framebuffer_pop_matrix (fb);
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cogl_onscreen_swap_buffers (COGL_ONSCREEN (fb));
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return FALSE;
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}
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static void
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handle_event (Data *data, SDL_Event *event)
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{
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switch (event->type)
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{
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case SDL_VIDEOEXPOSE:
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data->redraw_queued = TRUE;
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break;
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case SDL_MOUSEMOTION:
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{
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int width =
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cogl_framebuffer_get_width (COGL_FRAMEBUFFER (data->fb));
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int height =
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cogl_framebuffer_get_height (COGL_FRAMEBUFFER (data->fb));
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data->center_x = event->motion.x * 2.0f / width - 1.0f;
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data->center_y = event->motion.y * 2.0f / height - 1.0f;
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data->redraw_queued = TRUE;
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}
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break;
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case SDL_QUIT:
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data->quit = TRUE;
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break;
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}
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}
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int
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main (int argc, char **argv)
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{
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CoglContext *ctx;
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CoglOnscreen *onscreen;
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GError *error = NULL;
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CoglVertexP2C4 triangle_vertices[] = {
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{0, 0.7, 0xff, 0x00, 0x00, 0x80},
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{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
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{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
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};
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Data data;
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SDL_Event event;
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ctx = cogl_sdl_context_new (SDL_USEREVENT, &error);
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if (!ctx)
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{
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fprintf (stderr, "Failed to create context: %s\n", error->message);
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return 1;
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}
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onscreen = cogl_onscreen_new (ctx, 800, 600);
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data.fb = COGL_FRAMEBUFFER (onscreen);
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data.center_x = 0.0f;
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data.center_y = 0.0f;
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data.quit = FALSE;
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cogl_onscreen_show (onscreen);
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data.triangle = cogl_primitive_new_p2c4 (ctx, COGL_VERTICES_MODE_TRIANGLES,
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3, triangle_vertices);
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data.pipeline = cogl_pipeline_new (ctx);
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data.redraw_queued = TRUE;
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while (!data.quit)
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{
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while (!data.quit)
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{
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if (!SDL_PollEvent (&event))
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{
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if (data.redraw_queued)
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break;
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cogl_sdl_idle (ctx);
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if (!SDL_WaitEvent (&event))
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{
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fprintf (stderr, "Error waiting for SDL events");
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return 1;
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}
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}
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handle_event (&data, &event);
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cogl_sdl_handle_event (ctx, &event);
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}
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data.redraw_queued = redraw (&data);
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}
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cogl_object_unref (ctx);
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return 0;
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}
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