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added a 'default' swap chain

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jp9000
2013-10-03 06:17:43 -07:00
parent df58b3a9b7
commit 98a74e211a
3 changed files with 103 additions and 39 deletions
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87
libobs-opengl/gl-windows.c
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@@ -5,16 +5,21 @@
#include "gl-subsystem.h"
#include "glew/include/GL/wglew.h"
/* Basically swapchain-specific information. Fortunately for windows this is
* super basic stuff */
struct gl_windowinfo {
HWND hwnd;
HDC hdc;
};
/* Like the other subsystems, the GL subsystem has one swap chain created by
* default. */
struct gl_platform {
HGLRC hrc;
struct gl_windowinfo *wi;
struct gs_swap_chain swap;
};
/* For now, only support basic 32bit formats for graphics output. */
static inline int get_color_format_bits(enum gs_color_format format)
{
switch (format) {
@@ -71,6 +76,7 @@ struct dummy_context {
HDC hdc;
};
/* Need a dummy window for the dummy context */
static bool gl_register_dummy_window_class(void)
{
WNDCLASSA wc;
@@ -104,7 +110,7 @@ static inline HWND gl_create_dummy_window(void)
return hwnd;
}
static HGLRC gl_init_context(HDC hdc)
static inline HGLRC gl_init_context(HDC hdc)
{
HGLRC hglrc = wglCreateContext(hdc);
if (!hglrc) {
@@ -158,7 +164,7 @@ static bool gl_dummy_context_init(struct dummy_context *dummy)
return true;
}
static void gl_dummy_context_free(struct dummy_context *dummy)
static inline void gl_dummy_context_free(struct dummy_context *dummy)
{
wglMakeCurrent(NULL, NULL);
wglDeleteContext(dummy->hrc);
@@ -204,6 +210,7 @@ static inline void add_attrib(struct darray *list, int attrib, int val)
darray_push_back(sizeof(int), list, &val);
}
/* Creates the real pixel format for the target window */
static int gl_choose_pixel_format(HDC hdc, struct gs_init_data *info)
{
struct darray attribs;
@@ -272,7 +279,40 @@ static inline bool gl_set_pixel_format(HDC hdc, int format,
return true;
}
struct gl_platform *gl_platform_create(struct gs_init_data *info)
static struct gl_windowinfo *gl_windowinfo_bare(struct gs_init_data *info)
{
struct gl_windowinfo *wi = bmalloc(sizeof(struct gl_windowinfo));
memset(wi, 0, sizeof(struct gl_windowinfo));
wi->hwnd = info->hwnd;
wi->hdc = GetDC(wi->hwnd);
if (!wi->hdc) {
blog(LOG_ERROR, "Unable to get device context from window");
bfree(wi);
return NULL;
}
return wi;
}
static bool init_default_swap(struct gl_platform *plat, device_t device,
int pixel_format, PIXELFORMATDESCRIPTOR *pfd,
struct gs_init_data *info)
{
plat->swap.device = device;
plat->swap.info = *info;
plat->swap.wi = gl_windowinfo_bare(info);
if (!plat->swap.wi)
return false;
if (!gl_set_pixel_format(plat->swap.wi->hdc, pixel_format, pfd))
return false;
return true;
}
struct gl_platform *gl_platform_create(device_t device,
struct gs_init_data *info)
{
struct gl_platform *plat = bmalloc(sizeof(struct gl_platform));
struct dummy_context dummy;
@@ -295,25 +335,27 @@ struct gl_platform *gl_platform_create(struct gs_init_data *info)
gl_dummy_context_free(&dummy);
plat->wi = gl_windowinfo_create(info);
if (!plat->wi)
if (!init_default_swap(plat, device, pixel_format, &pfd, info))
goto fail;
if (!gl_set_pixel_format(plat->wi->hdc, pixel_format, &pfd))
goto fail;
plat->hrc = gl_init_context(plat->wi->hdc);
plat->hrc = gl_init_context(plat->swap.wi->hdc);
if (!plat->hrc)
goto fail;
return plat;
fail:
blog(LOG_ERROR, "gl_platform_create failed");
gl_platform_destroy(plat);
gl_dummy_context_free(&dummy);
return NULL;
}
struct gs_swap_chain *gl_platform_getswap(struct gl_platform *platform)
{
return &platform->swap;
}
void gl_platform_destroy(struct gl_platform *plat)
{
if (plat) {
@@ -322,25 +364,32 @@ void gl_platform_destroy(struct gl_platform *plat)
wglDeleteContext(plat->hrc);
}
gl_windowinfo_destroy(plat->wi);
gl_windowinfo_destroy(plat->swap.wi);
bfree(plat);
}
}
struct gl_windowinfo *gl_windowinfo_create(struct gs_init_data *info)
{
struct gl_windowinfo *wi = bmalloc(sizeof(struct gl_windowinfo));
memset(wi, 0, sizeof(struct gl_windowinfo));
struct gl_windowinfo *wi = gl_windowinfo_bare(info);
PIXELFORMATDESCRIPTOR pfd;
int pixel_format;
wi->hwnd = info->hwnd;
wi->hdc = GetDC(wi->hwnd);
if (!wi->hdc) {
blog(LOG_ERROR, "Unable to get device context from window");
bfree(wi);
if (!wi)
return NULL;
}
if (!gl_get_pixel_format(wi->hdc, info, &pixel_format, &pfd))
goto fail;
if (!gl_set_pixel_format(wi->hdc, pixel_format, &pfd))
goto fail;
return wi;
fail:
blog(LOG_ERROR, "gl_windowinfo_create failed");
gl_windowinfo_destroy(wi);
return NULL;
}
void gl_windowinfo_destroy(struct gl_windowinfo *wi)