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add frame flipping code

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jp9000
2013-10-26 15:05:51 -07:00
parent 7dada3bef4
commit d2ba08e46b
6 changed files with 41 additions and 19 deletions
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44
libobs/graphics/graphics.c
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@@ -644,12 +644,42 @@ texture_t gs_create_volumetexture_from_file(const char *file, uint32_t flags)
return NULL;
}
void gs_draw_sprite(texture_t tex)
static inline void assign_sprite_uv(float *start, float *end, bool flip)
{
if (!flip) {
*start = 0.0f;
*end = 1.0f;
} else {
*start = 1.0f;
*end = 0.0f;
}
}
static inline void build_sprite(struct vb_data *data, float fcx, float fcy,
uint32_t flip)
{
struct vec2 *tvarray = data->tvarray[0].array;
float start_u, end_u;
float start_v, end_v;
assign_sprite_uv(&start_u, &end_u, (flip & GS_FLIP_U) != 0);
assign_sprite_uv(&start_v, &end_v, (flip & GS_FLIP_V) != 0);
vec3_zero(data->points);
vec3_set(data->points+1, fcx, 0.0f, 0.0f);
vec3_set(data->points+2, 0.0f, fcy, 0.0f);
vec3_set(data->points+3, fcx, fcy, 0.0f);
vec2_set(tvarray, start_u, start_v);
vec2_set(tvarray+1, end_u, start_v);
vec2_set(tvarray+2, start_u, end_v);
vec2_set(tvarray+3, end_u, end_v);
}
void gs_draw_sprite(texture_t tex, uint32_t flip)
{
graphics_t graphics = thread_graphics;
float fcx, fcy;
struct vb_data *data;
struct vec2 *tvarray;
assert(tex);
@@ -662,15 +692,7 @@ void gs_draw_sprite(texture_t tex)
fcy = (float)texture_getheight(tex);
data = vertexbuffer_getdata(graphics->sprite_buffer);
tvarray = data->tvarray[0].array;
vec3_zero(data->points);
vec3_set(data->points+1, fcx, 0.0f, 0.0f);
vec3_set(data->points+2, 0.0f, fcy, 0.0f);
vec3_set(data->points+3, fcx, fcy, 0.0f);
vec2_zero(tvarray);
vec2_set(tvarray+1, 1.0f, 0.0f);
vec2_set(tvarray+2, 0.0f, 1.0f);
vec2_set(tvarray+3, 1.0f, 1.0f);
build_sprite(data, fcx, fcy, flip);
vertexbuffer_flush(graphics->sprite_buffer, false);
gs_load_vertexbuffer(graphics->sprite_buffer);
gs_load_indexbuffer(NULL);

5
libobs/graphics/graphics.h
View File

@@ -479,7 +479,10 @@ EXPORT texture_t gs_create_cubetexture_from_file(const char *flie,
EXPORT texture_t gs_create_volumetexture_from_file(const char *flie,
uint32_t flags);
EXPORT void gs_draw_sprite(texture_t tex);
#define GS_FLIP_U (1<<0)
#define GS_FLIP_V (1<<1)
EXPORT void gs_draw_sprite(texture_t tex, uint32_t flip);
EXPORT void gs_draw_cube_backdrop(texture_t cubetex, const struct quat *rot,
float left, float right, float top, float bottom, float znear);