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added some very basic im2d stuff to gl3

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This commit is contained in:
aap
2016-08-21 18:20:27 +02:00
parent 2cd032a79e
commit c0adc2cb1b
14 changed files with 238 additions and 13 deletions
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4
src/gl/gl3driver.cpp
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@@ -12,6 +12,7 @@
#include <GL/glew.h>
#include "rwgl3.h"
#include "rwgl3shader.h"
#include "rwgl3impl.h"
namespace rw {
namespace gl3 {
@@ -417,6 +418,7 @@ initializeRender(void)
engine->clearCamera = clearCamera;
engine->setRenderState = setRenderState;
engine->getRenderState = getRenderState;
engine->im2DRenderIndexedPrimitive = im2DRenderIndexedPrimitive;
engine->zNear = -1.0f;
engine->zFar = 1.0f;
@@ -461,6 +463,8 @@ initializeRender(void)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1,
0, GL_RGBA, GL_UNSIGNED_BYTE, &whitepixel);
im2DInit();
}
}
}

90
src/gl/gl3im2d.cpp Normal file
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@@ -0,0 +1,90 @@
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "../rwbase.h"
#include "../rwerror.h"
#include "../rwplg.h"
#include "../rwpipeline.h"
#include "../rwobjects.h"
#include "../rwengine.h"
#ifdef RW_OPENGL
#include <GL/glew.h>
#include "rwgl3.h"
#include "rwgl3shader.h"
namespace rw {
namespace gl3 {
uint32 im2DVbo, im2DIbo;
#define STARTINDICES 1024
#define STARTVERTICES 1024
static Shader *im2dShader;
static AttribDesc attribDesc[3] = {
{ ATTRIB_POS, GL_FLOAT, GL_FALSE, 3,
sizeof(Im2DVertex), 0 },
{ ATTRIB_COLOR, GL_UNSIGNED_BYTE, GL_TRUE, 4,
sizeof(Im2DVertex), offsetof(Im2DVertex, r) },
{ ATTRIB_TEXCOORDS0, GL_FLOAT, GL_FALSE, 2,
sizeof(Im2DVertex), offsetof(Im2DVertex, r) },
};
static int primTypeMap[] = {
GL_POINTS, // invalid
GL_LINES,
GL_LINE_STRIP,
GL_TRIANGLES,
GL_TRIANGLE_STRIP,
GL_TRIANGLE_FAN,
GL_POINTS
};
void
im2DInit(void)
{
#include "shaders/im2d_gl3.inc"
im2dShader = Shader::fromStrings(im2d_vert_src, im2d_frag_src);
glGenBuffers(1, &im2DIbo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im2DIbo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, STARTINDICES*2,
nil, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glGenBuffers(1, &im2DVbo);
glBindBuffer(GL_ARRAY_BUFFER, im2DVbo);
glBufferData(GL_ARRAY_BUFFER, STARTVERTICES*sizeof(Im2DVertex),
nil, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
void
im2DRenderIndexedPrimitive(PrimitiveType primType,
void *vertices, int32 numVertices,
void *indices, int32 numIndices)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im2DIbo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, numIndices*2,
indices, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, im2DVbo);
glBufferData(GL_ARRAY_BUFFER, numVertices*sizeof(Im2DVertex),
vertices, GL_DYNAMIC_DRAW);
setAttribPointers(attribDesc, 3);
im2dShader->use();
setTexture(0, engine->imtexture);
flushCache();
glDrawElements(primTypeMap[primType], numIndices,
GL_UNSIGNED_SHORT, nil);
disableAttribPointers(attribDesc, 3);
}
}
}
#endif

6
src/gl/gl3pipe.cpp
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@@ -68,10 +68,10 @@ instance(rw::ObjPipeline *rwpipe, Atomic *atomic)
header->vbo = 0;
glGenBuffers(1, &header->ibo);
glBindBuffer(GL_ARRAY_BUFFER, header->ibo);
glBufferData(GL_ARRAY_BUFFER, header->totalNumIndex*2,
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, header->ibo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, header->totalNumIndex*2,
header->indexBuffer, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
pipe->instanceCB(geo, header);
}

6
src/gl/gl3plugins.cpp
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@@ -195,7 +195,7 @@ matfxRenderCB(Atomic *atomic, InstanceDataHeader *header)
glBindBuffer(GL_ARRAY_BUFFER, header->vbo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, header->ibo);
setAttribPointers(header);
setAttribPointers(header->attribDesc, header->numAttribs);
InstanceData *inst = header->inst;
int32 n = header->numMeshes;
@@ -215,6 +215,7 @@ matfxRenderCB(Atomic *atomic, InstanceDataHeader *header)
}
inst++;
}
disableAttribPointers(header->attribDesc, header->numAttribs);
}
ObjPipeline*
@@ -454,7 +455,7 @@ skinRenderCB(Atomic *atomic, InstanceDataHeader *header)
glBindBuffer(GL_ARRAY_BUFFER, header->vbo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, header->ibo);
setAttribPointers(header);
setAttribPointers(header->attribDesc, header->numAttribs);
InstanceData *inst = header->inst;
int32 n = header->numMeshes;
@@ -489,6 +490,7 @@ skinRenderCB(Atomic *atomic, InstanceDataHeader *header)
GL_UNSIGNED_SHORT, (void*)(uintptr)inst->offset);
inst++;
}
disableAttribPointers(header->attribDesc, header->numAttribs);
}
ObjPipeline*

17
src/gl/gl3render.cpp
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@@ -21,18 +21,24 @@ namespace gl3 {
#define MAX_LIGHTS 8
void
setAttribPointers(InstanceDataHeader *header)
setAttribPointers(AttribDesc *attribDescs, int32 numAttribs)
{
AttribDesc *a;
for(a = header->attribDesc;
a != &header->attribDesc[header->numAttribs];
a++){
for(a = attribDescs; a != &attribDescs[numAttribs]; a++){
glEnableVertexAttribArray(a->index);
glVertexAttribPointer(a->index, a->size, a->type, a->normalized,
a->stride, (void*)(uint64)a->offset);
}
}
void
disableAttribPointers(AttribDesc *attribDescs, int32 numAttribs)
{
AttribDesc *a;
for(a = attribDescs; a != &attribDescs[numAttribs]; a++)
glDisableVertexAttribArray(a->index);
}
void
lightingCB(void)
{
@@ -73,7 +79,7 @@ defaultRenderCB(Atomic *atomic, InstanceDataHeader *header)
glBindBuffer(GL_ARRAY_BUFFER, header->vbo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, header->ibo);
setAttribPointers(header);
setAttribPointers(header->attribDesc, header->numAttribs);
InstanceData *inst = header->inst;
int32 n = header->numMeshes;
@@ -104,6 +110,7 @@ defaultRenderCB(Atomic *atomic, InstanceDataHeader *header)
GL_UNSIGNED_SHORT, (void*)(uintptr)inst->offset);
inst++;
}
disableAttribPointers(header->attribDesc, header->numAttribs);
}

10
src/gl/rwgl3.h
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@@ -58,7 +58,15 @@ struct InstanceDataHeader : rw::InstanceDataHeader
InstanceData *inst;
};
void setAttribPointers(InstanceDataHeader *header);
struct Im2DVertex
{
float32 x, y, z;
uint8 r, g, b, a;
float32 u, v;
};
void setAttribPointers(AttribDesc *attribDescs, int32 numAttribs);
void disableAttribPointers(AttribDesc *attribDescs, int32 numAttribs);
// Render state

4
src/gl/rwgl3impl.h
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@@ -4,6 +4,10 @@ namespace gl3 {
#ifdef RW_OPENGL
extern Shader *simpleShader;
extern uint32 im2DVbo, im2DIbo;
void im2DInit(void);
void im2DRenderIndexedPrimitive(PrimitiveType primType,
void *vertices, int32 numVertices, void *indices, int32 numIndices);
#endif

10
src/gl/shaders/Makefile
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@@ -1,4 +1,12 @@
all: simple_gl3.inc matfx_gl3.inc skin_gl3.inc
all: im2d_gl3.inc simple_gl3.inc matfx_gl3.inc skin_gl3.inc
im2d_gl3.inc: im2d.frag im2d.vert
(echo 'const char *im2d_vert_src =';\
sed 's/..*/"&\\n"/' im2d.vert;\
echo ';';\
echo 'const char *im2d_frag_src =';\
sed 's/..*/"&\\n"/' im2d.frag;\
echo ';') >im2d_gl3.inc
simple_gl3.inc: simple.frag simple.vert
(echo 'const char *simple_vert_src =';\

15
src/gl/shaders/im2d.frag Normal file
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@@ -0,0 +1,15 @@
#version 330
uniform sampler2D tex;
in vec4 v_color;
in vec2 v_tex0;
out vec4 color;
void
main(void)
{
color = v_color*texture2D(tex, vec2(v_tex0.x, v_tex0.y));
}

23
src/gl/shaders/im2d.vert Normal file
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@@ -0,0 +1,23 @@
#version 330
layout(std140) uniform Im2DState
{
int u_alphaTest;
float u_alphaRef;
mat4 u_xform;
};
layout(location = 0) in vec3 in_pos;
layout(location = 2) in vec4 in_color;
layout(location = 3) in vec2 in_tex0;
out vec4 v_color;
out vec2 v_tex0;
void
main(void)
{
gl_Position = vec4(in_pos, 1.0);
v_color = in_color;
v_tex0 = in_tex0;
}

42
src/gl/shaders/im2d_gl3.inc Normal file
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@@ -0,0 +1,42 @@
const char *im2d_vert_src =
"#version 330\n"
"layout(std140) uniform Im2DState\n"
"{\n"
" int u_alphaTest;\n"
" float u_alphaRef;\n"
" mat4 u_xform;\n"
"};\n"
"layout(location = 0) in vec3 in_pos;\n"
"layout(location = 2) in vec4 in_color;\n"
"layout(location = 3) in vec2 in_tex0;\n"
"out vec4 v_color;\n"
"out vec2 v_tex0;\n"
"void\n"
"main(void)\n"
"{\n"
" gl_Position = vec4(in_pos, 1.0);\n"
" v_color = in_color;\n"
" v_tex0 = in_tex0;\n"
"}\n"
;
const char *im2d_frag_src =
"#version 330\n"
"uniform sampler2D tex;\n"
"in vec4 v_color;\n"
"in vec2 v_tex0;\n"
"out vec4 color;\n"
"void\n"
"main(void)\n"
"{\n"
" color = v_color*texture2D(tex, vec2(v_tex0.x, v_tex0.y));\n"
"}\n"
;