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ppsspp/GPU/GLES/TransformPipeline.cpp

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// Copyright (c) 2012- PPSSPP Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#if defined(ANDROID) || defined(BLACKBERRY)
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#else
#include <GL/glew.h>
#if defined(__APPLE__)
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#endif
#include "../../Core/MemMap.h"
#include "../../Core/Host.h"
#include "../../Core/System.h"
#include "../Math3D.h"
#include "../GPUState.h"
#include "../ge_constants.h"
#include "TextureCache.h"
#include "TransformPipeline.h"
#include "VertexDecoder.h"
#include "ShaderManager.h"
GLuint glprim[8] =
{
GL_POINTS,
GL_LINES,
GL_LINE_STRIP,
GL_TRIANGLES,
GL_TRIANGLE_STRIP,
GL_TRIANGLE_FAN,
GL_TRIANGLES, // With OpenGL ES we have to expand sprites into triangles, tripling the data instead of doubling. sigh. OpenGL ES, Y U NO SUPPORT GL_QUADS?
};
DecodedVertex decoded[65536];
TransformedVertex transformed[65536];
TransformedVertex transformedExpanded[65536];
uint16_t indexBuffer[65536]; // Unused
// TODO: This should really return 2 colors, one for specular and one for diffuse.
// Convenient way to do precomputation to save the parts of the lighting calculation
// that's common between the many vertices of a draw call.
class Lighter {
public:
Lighter();
void Light(float colorOut0[4], float colorOut1[4], const float colorIn[4], Vec3 pos, Vec3 normal, float dots[4]);
private:
bool disabled_;
Color4 globalAmbient;
Color4 materialEmissive;
Color4 materialAmbient;
Color4 materialDiffuse;
Color4 materialSpecular;
float specCoef_;
Vec3 viewer_;
bool doShadeMapping_;
int materialUpdate_;
};
Lighter::Lighter() {
disabled_ = false;
doShadeMapping_ = (gstate.texmapmode & 0x3) == 2;
if (!doShadeMapping_ && !(gstate.lightEnable[0]&1) && !(gstate.lightEnable[1]&1) && !(gstate.lightEnable[2]&1) && !(gstate.lightEnable[3]&1))
{
disabled_ = true;
}
materialEmissive.GetFromRGB(gstate.materialemissive);
materialEmissive.a = 0.0f;
globalAmbient.GetFromRGB(gstate.ambientcolor);
globalAmbient.GetFromA(gstate.ambientalpha);
materialAmbient.GetFromRGB(gstate.materialambient);
materialAmbient.a = 1.0f;
materialDiffuse.GetFromRGB(gstate.materialdiffuse);
materialDiffuse.a = 1.0f;
materialSpecular.GetFromRGB(gstate.materialspecular);
materialSpecular.a = 1.0f;
specCoef_ = getFloat24(gstate.materialspecularcoef);
viewer_ = Vec3(-gstate.viewMatrix[9], -gstate.viewMatrix[10], -gstate.viewMatrix[11]);
materialUpdate_ = gstate.materialupdate & 7;
}
void Lighter::Light(float colorOut0[4], float colorOut1[4], const float colorIn[4], Vec3 pos, Vec3 normal, float dots[4])
{
if (disabled_) {
memcpy(colorOut0, colorIn, sizeof(float) * 4);
memset(colorOut1, 0, sizeof(float) * 4);
return;
}
Vec3 norm = normal.Normalized();
Color4 in(colorIn);
const Color4 *ambient;
if (materialUpdate_ & 1)
ambient = &in;
else
ambient = &materialAmbient;
const Color4 *diffuse;
if (materialUpdate_ & 2)
diffuse = &in;
else
diffuse = &materialDiffuse;
const Color4 *specular;
if (materialUpdate_ & 4)
specular = &in;
else
specular = &materialSpecular;
Color4 lightSum0 = globalAmbient * *ambient + materialEmissive;
Color4 lightSum1(0,0,0,0);
// Try lights.elf - there's something wrong with the lighting
for (int l = 0; l < 4; l++)
{
// can we skip this light?
if ((gstate.lightEnable[l] & 1) == 0 && !doShadeMapping_)
continue;
GELightComputation comp = (GELightComputation)(gstate.ltype[l]&3);
GELightType type = (GELightType)((gstate.ltype[l]>>8)&3);
Vec3 toLight;
if (type == GE_LIGHTTYPE_DIRECTIONAL)
toLight = Vec3(gstate.lightpos[l]); // lightdir is for spotlights
else
toLight = Vec3(gstate.lightpos[l]) - pos;
bool doSpecular = (comp != GE_LIGHTCOMP_ONLYDIFFUSE);
bool poweredDiffuse = comp == GE_LIGHTCOMP_BOTHWITHPOWDIFFUSE;
float lightScale = 1.0f;
if (type != GE_LIGHTTYPE_DIRECTIONAL)
{
float distance = toLight.Normalize();
lightScale = 1.0f / (gstate.lightatt[l][0] + gstate.lightatt[l][1]*distance + gstate.lightatt[l][2]*distance*distance);
if (lightScale > 1.0f) lightScale = 1.0f;
}
float dot = toLight * norm;
// Clamp dot to zero.
if (dot < 0.0f) dot = 0.0f;
if (poweredDiffuse)
dot = powf(dot, specCoef_);
Color4 diff = (gstate.lightColor[1][l] * *diffuse) * (dot * lightScale);
// Real PSP specular
Vec3 toViewer(0,0,1);
// Better specular
//Vec3 toViewer = (viewer - pos).Normalized();
if (doSpecular)
{
Vec3 halfVec = toLight;
halfVec += toViewer;
halfVec.Normalize();
dot = halfVec * norm;
if (dot >= 0)
{
lightSum1 += (gstate.lightColor[2][l] * *specular * (powf(dot, specCoef_)*lightScale));
}
}
dots[l] = dot;
if (gstate.lightEnable[l] & 1)
{
lightSum0 += gstate.lightColor[0][l] * *ambient + diff;
}
}
// 4?
for (int i = 0; i < 4; i++) {
colorOut0[i] = lightSum0[i];
colorOut1[i] = lightSum1[i];
}
}
// This is the software transform pipeline, which is necessary for supporting RECT
// primitives correctly. Other primitives are possible to transform and light in hardware
// using vertex shader, which will be way, way faster, especially on mobile. This has
// not yet been implemented though.
void TransformAndDrawPrim(void *verts, void *inds, int prim, int vertexCount, LinkedShader *program, float *customUV, int forceIndexType)
{
int indexLowerBound, indexUpperBound;
// First, decode the verts and apply morphing
VertexDecoder dec;
dec.SetVertexType(gstate.vertType);
dec.DecodeVerts(decoded, verts, inds, prim, vertexCount, &indexLowerBound, &indexUpperBound);
bool useTexCoord = false;
// Check if anything needs updating
if (gstate.textureChanged)
{
if (gstate.textureMapEnable && !(gstate.clearmode & 1))
{
PSPSetTexture();
useTexCoord = true;
}
}
// Then, transform and draw in one big swoop (urgh!)
// need to move this to the shader.
// We're gonna have to keep software transforming RECTANGLES, unless we use a geom shader which we can't on OpenGL ES 2.0.
// Usually, though, these primitives don't use lighting etc so it's no biggie performance wise, but it would be nice to get rid of
// this code.
// Actually, if we find the camera-relative right and down vectors, it might even be possible to add the extra points in pre-transformed
// space and thus make decent use of hardware transform.
// Actually again, single quads could be drawn more efficiently using GL_TRIANGLE_STRIP, no need to duplicate verts as for
// GL_TRIANGLES. Still need to sw transform to compute the extra two corners though.
// Temporary storage for RECTANGLES emulation
float v2[3] = {0};
float uv2[2] = {0};
// TODO: Could use glDrawElements in some cases, see below.
// TODO: Split up into multiple draw calls for Android where you can't guarantee support for more than 0x10000 verts.
#if defined(ANDROID) || defined(BLACKBERRY)
if (vertexCount > 0x10000/3)
vertexCount = 0x10000/3;
#endif
Lighter lighter;
for (int index = indexLowerBound; index <= indexUpperBound; index++)
{
float v[3] = {0, 0, 0};
float c0[4] = {1, 1, 1, 1};
float c1[4] = {0, 0, 0, 0};
float uv[2] = {0, 0};
if (gstate.vertType & GE_VTYPE_THROUGH_MASK)
{
// Do not touch the coordinates or the colors. No lighting.
for (int j=0; j<3; j++)
v[j] = decoded[index].pos[j];
// TODO : check if has color
for (int j=0; j<4; j++) {
c0[j] = decoded[index].color[j] / 255.0f;
c1[j] = 0.0f;
}
// TODO : check if has uv
for (int j=0; j<2; j++)
uv[j] = decoded[index].uv[j];
// Rescale UV?
}
else
{
// We do software T&L for now
float out[3], norm[3];
if ((gstate.vertType & GE_VTYPE_WEIGHT_MASK) == GE_VTYPE_WEIGHT_NONE)
{
Vec3ByMatrix43(out, decoded[index].pos, gstate.worldMatrix);
Norm3ByMatrix43(norm, decoded[index].normal, gstate.worldMatrix);
}
else
{
// Skinning
Vec3 psum(0,0,0);
Vec3 nsum(0,0,0);
int nweights = ((gstate.vertType & GE_VTYPE_WEIGHTCOUNT_MASK) >> GE_VTYPE_WEIGHTCOUNT_SHIFT) + 1;
for (int i = 0; i < nweights; i++)
{
if (decoded[index].weights[i] != 0.0f) {
Vec3ByMatrix43(out, decoded[index].pos, gstate.boneMatrix+i*12);
Norm3ByMatrix43(norm, decoded[index].normal, gstate.boneMatrix+i*12);
Vec3 tpos(out), tnorm(norm);
psum += tpos*decoded[index].weights[i];
nsum += tnorm*decoded[index].weights[i];
}
}
nsum.Normalize();
Vec3ByMatrix43(out, psum.v, gstate.worldMatrix);
Norm3ByMatrix43(norm, nsum.v, gstate.worldMatrix);
}
// Perform lighting here if enabled. don't need to check through, it's checked above.
float dots[4] = {0,0,0,0};
if (program->a_color0 != -1)
{
float unlitColor[4];
for (int j = 0; j < 4; j++) {
unlitColor[j] = decoded[index].color[j] / 255.0f;
}
float litColor0[4];
float litColor1[4];
lighter.Light(litColor0, litColor1, unlitColor, out, norm, dots);
if (gstate.lightingEnable & 1)
{
// TODO: don't ignore gstate.lmode - we should send two colors in that case
if (gstate.lmode & 1) {
// Separate colors
for (int j = 0; j < 4; j++) {
c0[j] = litColor0[j];
c1[j] = litColor1[j];
}
} else {
// Summed color into c0
for (int j = 0; j < 4; j++) {
c0[j] = litColor0[j] + litColor1[j];
c1[j] = 0.0f;
}
}
}
else
{
// no lighting? copy the color.
for (int j = 0; j < 4; j++) {
c0[j] = unlitColor[j];
c1[j] = 0.0f;
}
}
}
else
{
// no color in the fragment program???
for (int j = 0; j < 4; j++) {
c0[j] = decoded[index].color[j] / 255.0f;
c1[j] = 0.0f;
}
}
if (customUV) {
uv[0] = customUV[index * 2 + 0]*gstate.uScale + gstate.uOff;
uv[1] = customUV[index * 2 + 1]*gstate.vScale + gstate.vOff;
} else {
// Perform texture coordinate generation after the transform and lighting - one style of UV depends on lights.
switch (gstate.texmapmode & 0x3)
{
case 0: // UV mapping
// Texture scale/offset is only performed in this mode.
uv[0] = decoded[index].uv[0]*gstate.uScale + gstate.uOff;
uv[1] = decoded[index].uv[1]*gstate.vScale + gstate.vOff;
break;
case 1:
{
// Projection mapping
Vec3 source;
switch ((gstate.texmapmode >> 8) & 0x3)
{
case 0: // Use model space XYZ as source
source = decoded[index].pos;
break;
case 1: // Use unscaled UV as source
source = Vec3(decoded[index].uv[0], decoded[index].uv[1], 0.0f);
break;
case 2: // Use normalized normal as source
source = Vec3(norm).Normalized();
break;
case 3: // Use non-normalized normal as source!
source = Vec3(norm);
break;
}
float uvw[3];
Vec3ByMatrix43(uvw, &source.x, gstate.tgenMatrix);
uv[0] = uvw[0];
uv[1] = uvw[1];
}
break;
case 2:
// Shade mapping
{
int lightsource1 = gstate.texshade & 0x3;
int lightsource2 = (gstate.texshade >> 8) & 0x3;
uv[0] = dots[lightsource1];
uv[1] = dots[lightsource2];
}
break;
case 3:
// Illegal
break;
}
}
// Transform the coord by the view matrix.
// We only really need to do it here for RECTANGLES drawing. However,
// there's no point in optimizing it out because all other primitives
// will be moved to hardware transform anyway.
Vec3ByMatrix43(v, out, gstate.viewMatrix);
}
memcpy(&transformed[index].x, v, 3 * sizeof(float));
memcpy(&transformed[index].uv, uv, 2 * sizeof(float));
memcpy(&transformed[index].color0, c0, 4 * sizeof(float));
memcpy(&transformed[index].color1, c1, 4 * sizeof(float));
}
// Step 2: Expand using the index buffer, and expand rectangles.
const TransformedVertex *drawBuffer = transformed;
int numTrans = 0;
int indexType = (gstate.vertType & GE_VTYPE_IDX_MASK);
if (forceIndexType != -1) {
indexType = forceIndexType;
}
if (indexType == 0 && prim != GE_PRIM_RECTANGLES) {
// We can simply draw the unexpanded buffer.
numTrans = vertexCount;
} else {
numTrans = 0;
drawBuffer = transformedExpanded;
TransformedVertex *trans = &transformedExpanded[0];
TransformedVertex saved;
for (int i = 0; i < vertexCount; i++) {
int index;
if (indexType == GE_VTYPE_IDX_8BIT)
{
index = ((u8*)inds)[i];
}
else if (indexType == GE_VTYPE_IDX_16BIT)
{
index = ((u16*)inds)[i];
}
else
{
index = i;
}
TransformedVertex &transVtx = transformed[index];
if (prim != GE_PRIM_RECTANGLES)
{
*trans = transVtx;
trans++;
numTrans++;
}
else // We need to tesselate axis-aligned rectangles, as they're only specified by two coordinates.
{
if ((i & 1) == 0)
{
// Save this vertex so we can generate when we get the next one. Color is taken from the last vertex.
saved = transVtx;
}
else
{
// We have to turn the rectangle into two triangles, so 6 points. Sigh.
// top left
*trans = transVtx;
trans++;
// top right
*trans = transVtx;
trans->x = saved.x;
trans->uv[0] = saved.uv[0];
trans++;
// bottom right
*trans = transVtx;
trans->x = saved.x;
trans->uv[0] = saved.uv[0];
trans->y = saved.y;
trans->uv[1] = saved.uv[1];
trans++;
// bottom left
*trans = transVtx;
trans->y = saved.y;
trans->uv[1] = saved.uv[1];
trans++;
// top left
*trans = transVtx;
trans++;
// bottom right
*trans = transVtx;
trans->x = saved.x;
trans->uv[0] = saved.uv[0];
trans->y = saved.y;
trans->uv[1] = saved.uv[1];
trans++;
numTrans += 6;
}
}
}
}
glEnableVertexAttribArray(program->a_position);
if (useTexCoord && program->a_texcoord != -1) glEnableVertexAttribArray(program->a_texcoord);
if (program->a_color0 != -1) glEnableVertexAttribArray(program->a_color0);
if (program->a_color1 != -1) glEnableVertexAttribArray(program->a_color1);
const int vertexSize = sizeof(transformed[0]);
glVertexAttribPointer(program->a_position, 3, GL_FLOAT, GL_FALSE, vertexSize, drawBuffer);
if (useTexCoord && program->a_texcoord != -1) glVertexAttribPointer(program->a_texcoord, 2, GL_FLOAT, GL_FALSE, vertexSize, ((uint8_t*)drawBuffer) + 3 * 4);
if (program->a_color0 != -1) glVertexAttribPointer(program->a_color0, 4, GL_FLOAT, GL_FALSE, vertexSize, ((uint8_t*)drawBuffer) + 5 * 4);
if (program->a_color1 != -1) glVertexAttribPointer(program->a_color1, 4, GL_FLOAT, GL_FALSE, vertexSize, ((uint8_t*)drawBuffer) + 9 * 4);
// NOTICE_LOG(G3D,"DrawPrimitive: %i", numTrans);
glDrawArrays(glprim[prim], 0, numTrans);
glDisableVertexAttribArray(program->a_position);
if (useTexCoord && program->a_texcoord != -1) glDisableVertexAttribArray(program->a_texcoord);
if (program->a_color0 != -1) glDisableVertexAttribArray(program->a_color0);
if (program->a_color1 != -1) glDisableVertexAttribArray(program->a_color1);
/*
if (((gstate.vertType ) & GE_VTYPE_IDX_MASK) == GE_VTYPE_IDX_8BIT)
{
glDrawElements(glprim, vertexCount, GL_UNSIGNED_BYTE, inds);
}
else if (((gstate.vertType ) & GE_VTYPE_IDX_MASK) == GE_VTYPE_IDX_16BIT)
{
glDrawElements(glprim, vertexCount, GL_UNSIGNED_SHORT, inds);
}
else
{*/
}
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