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OpenGL2: Change normal/tangent vertex encoding.

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This commit is contained in:
SmileTheory 2014-10-28 18:15:13 -07:00
parent 7e808f92d6
commit e488663e31
8 changed files with 108 additions and 56 deletions
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140
code/renderergl2/tr_vbo.c
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@ -23,71 +23,126 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include "tr_local.h"
union pack10_u {
struct {
signed int x:10;
signed int y:10;
signed int z:10;
signed int w:2;
} pack;
uint32_t i;
};
union pack8_u {
struct {
signed int x:8;
signed int y:8;
signed int z:8;
signed int w:8;
} pack;
uint32_t i;
};
uint32_t R_VaoPackTangent(vec4_t v)
{
if (glRefConfig.packedNormalDataType == GL_UNSIGNED_INT_2_10_10_10_REV)
if (glRefConfig.packedNormalDataType == GL_INT_2_10_10_10_REV)
{
return (((uint32_t)(v[3] * 1.5f + 2.0f )) << 30)
| (((uint32_t)(v[2] * 511.5f + 512.0f)) << 20)
| (((uint32_t)(v[1] * 511.5f + 512.0f)) << 10)
| (((uint32_t)(v[0] * 511.5f + 512.0f)));
union pack10_u num;
num.pack.x = v[0] * 511.0f;
num.pack.y = v[1] * 511.0f;
num.pack.z = v[2] * 511.0f;
num.pack.w = v[3];
return num.i;
}
else
{
return (((uint32_t)(v[3] * 127.5f + 128.0f)) << 24)
| (((uint32_t)(v[2] * 127.5f + 128.0f)) << 16)
| (((uint32_t)(v[1] * 127.5f + 128.0f)) << 8)
| (((uint32_t)(v[0] * 127.5f + 128.0f)));
union pack8_u num;
num.pack.x = v[0] * 127.0f;
num.pack.y = v[1] * 127.0f;
num.pack.z = v[2] * 127.0f;
num.pack.w = v[3] * 127.0f;
return num.i;
}
}
uint32_t R_VaoPackNormal(vec3_t v)
{
if (glRefConfig.packedNormalDataType == GL_UNSIGNED_INT_2_10_10_10_REV)
if (glRefConfig.packedNormalDataType == GL_INT_2_10_10_10_REV)
{
return (((uint32_t)(v[2] * 511.5f + 512.0f)) << 20)
| (((uint32_t)(v[1] * 511.5f + 512.0f)) << 10)
| (((uint32_t)(v[0] * 511.5f + 512.0f)));
union pack10_u num;
num.pack.x = v[0] * 511.0f;
num.pack.y = v[1] * 511.0f;
num.pack.z = v[2] * 511.0f;
num.pack.w = 0;
return num.i;
}
else
{
return (((uint32_t)(v[2] * 127.5f + 128.0f)) << 16)
| (((uint32_t)(v[1] * 127.5f + 128.0f)) << 8)
| (((uint32_t)(v[0] * 127.5f + 128.0f)));
union pack8_u num;
num.pack.x = v[0] * 127.0f;
num.pack.y = v[1] * 127.0f;
num.pack.z = v[2] * 127.0f;
num.pack.w = 0;
return num.i;
}
}
void R_VaoUnpackTangent(vec4_t v, uint32_t b)
{
if (glRefConfig.packedNormalDataType == GL_UNSIGNED_INT_2_10_10_10_REV)
if (glRefConfig.packedNormalDataType == GL_INT_2_10_10_10_REV)
{
v[0] = ((b) & 0x3ff) * 1.0f/511.5f - 1.0f;
v[1] = ((b >> 10) & 0x3ff) * 1.0f/511.5f - 1.0f;
v[2] = ((b >> 20) & 0x3ff) * 1.0f/511.5f - 1.0f;
v[3] = ((b >> 30) & 0x3) * 1.0f/1.5f - 1.0f;
union pack10_u num;
num.i = b;
v[0] = num.pack.x / 511.0f;
v[1] = num.pack.y / 511.0f;
v[2] = num.pack.z / 511.0f;
v[3] = num.pack.w;
}
else
{
v[0] = ((b) & 0xff) * 1.0f/127.5f - 1.0f;
v[1] = ((b >> 8) & 0xff) * 1.0f/127.5f - 1.0f;
v[2] = ((b >> 16) & 0xff) * 1.0f/127.5f - 1.0f;
v[3] = ((b >> 24) & 0xff) * 1.0f/127.5f - 1.0f;
union pack8_u num;
num.i = b;
v[0] = num.pack.x / 127.0f;
v[1] = num.pack.y / 127.0f;
v[2] = num.pack.z / 127.0f;
v[3] = num.pack.w / 127.0f;
}
}
void R_VaoUnpackNormal(vec3_t v, uint32_t b)
{
if (glRefConfig.packedNormalDataType == GL_UNSIGNED_INT_2_10_10_10_REV)
if (glRefConfig.packedNormalDataType == GL_INT_2_10_10_10_REV)
{
v[0] = ((b) & 0x3ff) * 1.0f/511.5f - 1.0f;
v[1] = ((b >> 10) & 0x3ff) * 1.0f/511.5f - 1.0f;
v[2] = ((b >> 20) & 0x3ff) * 1.0f/511.5f - 1.0f;
union pack10_u num;
num.i = b;
v[0] = num.pack.x / 511.0f;
v[1] = num.pack.y / 511.0f;
v[2] = num.pack.z / 511.0f;
}
else
{
v[0] = ((b) & 0xff) * 1.0f/127.5f - 1.0f;
v[1] = ((b >> 8) & 0xff) * 1.0f/127.5f - 1.0f;
v[2] = ((b >> 16) & 0xff) * 1.0f/127.5f - 1.0f;
union pack8_u num;
num.i = b;
v[0] = num.pack.x / 127.0f;
v[1] = num.pack.y / 127.0f;
v[2] = num.pack.z / 127.0f;
}
}
@ -651,6 +706,7 @@ void RB_UpdateTessVao(unsigned int attribBits)
if(tess.numVertexes > 0 && tess.numVertexes <= SHADER_MAX_VERTEXES && tess.numIndexes > 0 && tess.numIndexes <= SHADER_MAX_INDEXES)
{
int attribIndex;
int attribUpload;
R_BindVao(tess.vao);
@ -661,25 +717,29 @@ void RB_UpdateTessVao(unsigned int attribBits)
if(!(attribBits & ATTR_BITS))
attribBits = ATTR_BITS;
if(attribBits & ATTR_TEXCOORD || attribBits & ATTR_LIGHTCOORD)
attribUpload = attribBits;
if((attribUpload & ATTR_TEXCOORD) || (attribUpload & ATTR_LIGHTCOORD))
{
// these are interleaved, so we update both if either need it
// this translates to updating ATTR_TEXCOORD twice as large as it needs
attribBits &= ~ATTR_LIGHTCOORD;
attribBits |= ATTR_TEXCOORD;
attribUpload &= ~ATTR_LIGHTCOORD;
attribUpload |= ATTR_TEXCOORD;
}
for (attribIndex = 0; attribIndex < ATTR_INDEX_COUNT; attribIndex++)
{
uint32_t attribBit = 1 << attribIndex;
vaoAttrib_t *vAtb = &tess.vao->attribs[attribIndex];
if (attribUpload & attribBit)
{
// note: tess has a VBO where stride == size
qglBufferSubDataARB(GL_ARRAY_BUFFER_ARB, vAtb->offset, tess.numVertexes * vAtb->stride, tess.attribPointers[attribIndex]);
}
if (attribBits & attribBit)
{
vaoAttrib_t *vAtb = &tess.vao->attribs[attribIndex];
// note: tess has a VBO where stride == size
qglBufferSubDataARB(GL_ARRAY_BUFFER_ARB, vAtb->offset, tess.numVertexes * vAtb->stride, tess.attribPointers[attribIndex]);
if (!glRefConfig.vertexArrayObject)
qglVertexAttribPointerARB(attribIndex, vAtb->count, vAtb->type, vAtb->normalized, vAtb->stride, BUFFER_OFFSET(vAtb->offset));