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Add SDL_RenderGeometry based on SDL_RenderGeometryRaw

This commit is contained in:
Sylvain 2021-04-01 09:55:00 +02:00 committed by Sylvain Becker
parent e481261173
commit cc37c38e30
4 changed files with 50 additions and 0 deletions
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29
include/SDL_render.h
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@ -85,6 +85,16 @@ typedef struct SDL_RendererInfo
int max_texture_height; /**< The maximum texture height */
} SDL_RendererInfo;
/**
* \brief Vertex structure
*/
typedef struct SDL_Vertex
{
SDL_FPoint position; /**< Vertex position, in SDL_Renderer coordinates */
SDL_Color color; /**< Vertex color */
SDL_FPoint tex_coord; /**< Normalized texture coordinates, if needed */
} SDL_Vertex;
/**
* The scaling mode for a texture.
*/
@ -1441,6 +1451,25 @@ extern DECLSPEC int SDLCALL SDL_RenderCopyExF(SDL_Renderer * renderer,
const SDL_FPoint *center,
const SDL_RendererFlip flip);
/**
* \brief Render a list of triangles, optionally using a texture and indices into the vertex array
* Color and alpha modulation is done per vertex (SDL_SetTextureColorMod and SDL_SetTextureAlphaMod are ignored).
*
* \param texture (optional) The SDL texture to use.
* \param vertices Vertices.
* \param num_vertices Number of vertices.
* \param indices (optional) An array of integer indices into the 'vertices' array, if NULL all vertices will be rendered in sequential order.
* \param num_indices Number of indices.
*
* \sa SDL_Vertex
*
* \return 0 on success, or -1 if the operation is not supported
*/
extern DECLSPEC int SDLCALL SDL_RenderGeometry(SDL_Renderer *renderer,
SDL_Texture *texture,
const SDL_Vertex *vertices, int num_vertices,
const int *indices, int num_indices);
/**
* \brief Render a list of triangles, optionally using a texture and indices into the vertex arrays
* Color and alpha modulation is done per vertex (SDL_SetTextureColorMod and SDL_SetTextureAlphaMod are ignored).

1
src/dynapi/SDL_dynapi_overrides.h
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@ -819,3 +819,4 @@
#define SDL_GetTextureUserData SDL_GetTextureUserData_REAL
#define SDL_RenderGeometry SDL_RenderGeometry_REAL
#define SDL_RenderGeometryRaw SDL_RenderGeometryRaw_REAL
#define SDL_RenderGeometry SDL_RenderGeometry_REAL

1
src/dynapi/SDL_dynapi_procs.h
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@ -884,3 +884,4 @@ SDL_DYNAPI_PROC(int,SDL_SetTextureUserData,(SDL_Texture *a, void *b),(a,b),retur
SDL_DYNAPI_PROC(void*,SDL_GetTextureUserData,(SDL_Texture *a),(a),return)
SDL_DYNAPI_PROC(int,SDL_RenderGeometry,(SDL_Renderer *a, SDL_Texture *b, SDL_Vertex *c, int d, int *e, int f),(a,b,c,d,e,f),return)
SDL_DYNAPI_PROC(int,SDL_RenderGeometryRaw,(SDL_Renderer *a, SDL_Texture *b, const float *c, int d, const int *e, int f, const float *g, int h, int i, const void *j, int k, int l),(a,b,c,d,e,f,g,h,i,j,k,l),return)
SDL_DYNAPI_PROC(int,SDL_RenderGeometry,(SDL_Renderer *a, SDL_Texture *b, const SDL_Vertex *c, int d, const int *e, int f),(a,b,c,d,e,f),return)

19
src/render/SDL_render.c
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@ -3330,6 +3330,25 @@ SDL_RenderCopyExF(SDL_Renderer * renderer, SDL_Texture * texture,
return retval < 0 ? retval : FlushRenderCommandsIfNotBatching(renderer);
}
#define SDL_OFFSETOF(_TYPE,_MEMBER) ((size_t)&(((_TYPE*)0)->_MEMBER))
int
SDL_RenderGeometry(SDL_Renderer *renderer,
SDL_Texture *texture,
const SDL_Vertex *vertices, int num_vertices,
const int *indices, int num_indices)
{
const float *xy = (const float *)((const Uint8 *)vertices + SDL_OFFSETOF(SDL_Vertex, position));
int xy_stride = sizeof (SDL_Vertex);
const int *color = (const int *) ((const Uint8 *)vertices + SDL_OFFSETOF(SDL_Vertex, color));
int color_stride = sizeof (SDL_Vertex);
const float *uv = (const float *)((const Uint8 *)vertices + SDL_OFFSETOF(SDL_Vertex, tex_coord));
int uv_stride = sizeof (SDL_Vertex);
int size_indice = 4;
return SDL_RenderGeometryRaw(renderer, texture, xy, xy_stride, color, color_stride, uv, uv_stride, num_vertices, indices, num_indices, size_indice);
}
int
SDL_RenderGeometryRaw(SDL_Renderer *renderer,
SDL_Texture *texture,