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adding glDrawElements

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This commit is contained in:
Bigfoot71 2025-10-25 23:37:20 +02:00
parent 1c20b5588d
commit 92e178ab51
1 changed files with 50 additions and 1 deletions
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51
src/external/rlsw.h vendored
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@ -376,6 +376,7 @@ typedef double GLclampd;
#define glTexCoordPointer(sz, t, s, p) swBindArray(SW_TEXTURE_COORD_ARRAY, (p))
#define glColorPointer(sz, t, s, p) swBindArray(SW_COLOR_ARRAY, (p))
#define glDrawArrays(m, o, c) swDrawArrays((m), (o), (c))
#define glDrawElements(m,c,t,i) swDrawElements((m),(c),(t),(i))
#define glGenTextures(c, v) swGenTextures((c), (v))
#define glDeleteTextures(c, v) swDeleteTextures((c), (v))
#define glTexImage2D(tr, l, if, w, h, b, f, t, p) swTexImage2D((w), (h), (f), (t), (p))
@ -393,7 +394,6 @@ typedef double GLclampd;
#define glDepthFunc(X) ((void)(X))
#define glTexSubImage2D(X,Y,Z,W,A,B,C,D,E) ((void)(X),(void)(Y),(void)(Z),(void)(W),(void)(A),(void)(B),(void)(C),(void)(D),(void)(E))
#define glGetTexImage(X,Y,Z,W,A) ((void)(X),(void)(Y),(void)(Z),(void)(W),(void)(A))
#define glDrawElements(X,Y,Z,W) ((void)(X),(void)(Y),(void)(Z),(void)(W))
#define glNormal3f(X,Y,Z) ((void)(X),(void)(Y),(void)(Z))
#define glNormal3fv(X) ((void)(X))
#define glNormalPointer(X,Y,Z) ((void)(X),(void)(Y),(void)(Z))
@ -589,6 +589,7 @@ SWAPI void swTexCoord2fv(const float *v);
SWAPI void swBindArray(SWarray type, void *buffer);
SWAPI void swDrawArrays(SWdraw mode, int offset, int count);
SWAPI void swDrawElements(SWdraw mode, int count, int type, const void *indices);
SWAPI void swGenTextures(int count, uint32_t *textures);
SWAPI void swDeleteTextures(int count, uint32_t *textures);
@ -4510,6 +4511,54 @@ void swDrawArrays(SWdraw mode, int offset, int count)
swEnd();
}
void swDrawElements(SWdraw mode, int count, int type, const void *indices)
{
if (RLSW.array.positions == 0)
{
RLSW.errCode = SW_INVALID_OPERATION;
return;
}
if (count < 0)
{
RLSW.errCode = SW_INVALID_VALUE;
return;
}
swBegin(mode);
{
swTexCoord2f(0.0f, 0.0f);
swColor4f(1.0f, 1.0f, 1.0f, 1.0f);
for (int i = 0; i < count; i++)
{
uint32_t index;
switch (type)
{
case SW_UNSIGNED_BYTE:
index = ((uint8_t*)indices)[i];
break;
case SW_UNSIGNED_SHORT:
index = ((uint16_t*)indices)[i];
break;
case SW_UNSIGNED_INT:
index = ((uint32_t*)indices)[i];
break;
default:
RLSW.errCode = SW_INVALID_ENUM;
swEnd();
return;
}
if (RLSW.array.texcoords) swTexCoord2fv(RLSW.array.texcoords + 2*index);
if (RLSW.array.colors) swColor4ubv(RLSW.array.colors + 4*index);
swVertex3fv(RLSW.array.positions + 3*index);
}
}
swEnd();
}
void swGenTextures(int count, uint32_t *textures)
{
if ((count == 0) || (textures == NULL)) return;