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Add opengl/graphics/rendertarget

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This commit is contained in:
Hajime Hoshi 2013-10-27 19:54:28 +09:00
parent af1e77eced
commit feb9ac103f
4 changed files with 62 additions and 48 deletions
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21
graphics/opengl/context.go
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@ -9,9 +9,10 @@ import (
"fmt"
"github.com/hajimehoshi/go-ebiten/graphics"
"github.com/hajimehoshi/go-ebiten/graphics/matrix"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/rendertarget"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/shader"
"github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
grendertarget "github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"image"
"math"
@ -23,9 +24,9 @@ type Context struct {
screenHeight int
screenScale int
textures map[graphics.TextureId]*gtexture.Texture
renderTargets map[graphics.RenderTargetId]*rendertarget.RenderTarget
renderTargets map[graphics.RenderTargetId]*grendertarget.RenderTarget
renderTargetToTexture map[graphics.RenderTargetId]graphics.TextureId
mainFramebufferTexture *rendertarget.RenderTarget
mainFramebufferTexture *grendertarget.RenderTarget
projectionMatrix [16]float32
}
@ -35,7 +36,7 @@ func newContext(screenWidth, screenHeight, screenScale int) *Context {
screenHeight: screenHeight,
screenScale: screenScale,
textures: map[graphics.TextureId]*gtexture.Texture{},
renderTargets: map[graphics.RenderTargetId]*rendertarget.RenderTarget{},
renderTargets: map[graphics.RenderTargetId]*grendertarget.RenderTarget{},
renderTargetToTexture: map[graphics.RenderTargetId]graphics.TextureId{},
}
return context
@ -48,10 +49,10 @@ func (context *Context) Init() {
C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &mainFramebuffer)
var err error
context.mainFramebufferTexture, err = texture.NewRenderTargetWithFramebuffer(
context.mainFramebufferTexture, err = rendertarget.NewRenderTargetWithFramebuffer(
context.screenWidth*context.screenScale,
context.screenHeight*context.screenScale,
texture.Framebuffer(mainFramebuffer))
rendertarget.Framebuffer(mainFramebuffer))
if err != nil {
panic("creating main framebuffer failed: " + err.Error())
}
@ -123,10 +124,10 @@ func (context *Context) SetOffscreen(renderTargetId graphics.RenderTargetId) {
context.setOffscreen(renderTarget)
}
func (context *Context) setOffscreen(renderTarget *rendertarget.RenderTarget) {
func (context *Context) setOffscreen(renderTarget *grendertarget.RenderTarget) {
C.glFlush()
framebuffer := C.GLuint(renderTarget.Framebuffer().(texture.Framebuffer))
framebuffer := C.GLuint(renderTarget.Framebuffer().(rendertarget.Framebuffer))
C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
err := C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER)
if err != C.GL_FRAMEBUFFER_COMPLETE {
@ -179,7 +180,7 @@ func (context *Context) flush() {
func (context *Context) NewRenderTarget(width, height int) (
graphics.RenderTargetId, error) {
renderTarget, err := texture.NewRenderTarget(width, height)
renderTarget, err := rendertarget.NewRenderTarget(width, height)
if err != nil {
return 0, nil
}

47
graphics/opengl/rendertarget/render_target.go Normal file
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@ -0,0 +1,47 @@
package rendertarget
// #cgo LDFLAGS: -framework OpenGL
//
// #include <OpenGL/gl.h>
import "C"
import (
"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
"github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
)
type Framebuffer C.GLuint
func createFramebuffer(nativeTexture C.GLuint) C.GLuint {
framebuffer := C.GLuint(0)
C.glGenFramebuffers(1, &framebuffer)
origFramebuffer := C.GLint(0)
C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &origFramebuffer)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
C.glFramebufferTexture2D(C.GL_FRAMEBUFFER, C.GL_COLOR_ATTACHMENT0,
C.GL_TEXTURE_2D, nativeTexture, 0)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, C.GLuint(origFramebuffer))
if C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER) !=
C.GL_FRAMEBUFFER_COMPLETE {
panic("creating framebuffer failed")
}
return framebuffer
}
func NewRenderTarget(width, height int) (*rendertarget.RenderTarget, error) {
tex, err := texture.New(width, height)
if err != nil {
return nil, err
}
framebuffer := createFramebuffer(C.GLuint(tex.Native().(texture.Native)))
return rendertarget.NewWithFramebuffer(tex, Framebuffer(framebuffer)), nil
}
func NewRenderTargetWithFramebuffer(width, height int, framebuffer Framebuffer) (*rendertarget.RenderTarget, error) {
tex, err := texture.New(width, height)
if err != nil {
return nil, err
}
return rendertarget.NewWithFramebuffer(tex, framebuffer), nil
}

4
graphics/opengl/shader/program.go
View File

@ -80,7 +80,7 @@ func getLocation(program C.GLuint, name string, qualifierVariableType int) C.GLi
defer C.free(unsafe.Pointer(locationName))
location := C.GLint(-1)
switch qualifierVariableType {
case qualifierVariableTypeAttribute:
location = C.glGetAttribLocation(program, (*C.GLchar)(locationName))
@ -111,7 +111,7 @@ func use(projectionMatrix [16]float32, geometryMatrix matrix.Geometry, colorMatr
program = programColorMatrix
}
C.glUseProgram(program)
C.glUniformMatrix4fv(C.GLint(getUniformLocation(program, "projection_matrix")),
1, C.GL_FALSE, (*C.GLfloat)(&projectionMatrix[0]))

38
graphics/opengl/texture/texture.go
View File

@ -5,7 +5,6 @@ package texture
// #include <OpenGL/gl.h>
import "C"
import (
"github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"image"
"unsafe"
@ -47,41 +46,8 @@ func createFromImage(img *image.NRGBA) (interface{}, error) {
return createNativeTexture(size.X, size.Y, img.Pix), nil
}
type Framebuffer C.GLuint
func NewRenderTarget(width, height int) (*rendertarget.RenderTarget, error) {
texture, err := gtexture.New(width, height, create)
if err != nil {
return nil, err
}
framebuffer := createFramebuffer(C.GLuint(texture.Native().(Native)))
return rendertarget.NewWithFramebuffer(texture, Framebuffer(framebuffer)), nil
}
func NewRenderTargetWithFramebuffer(width, height int, framebuffer Framebuffer) (*rendertarget.RenderTarget, error) {
texture, err := gtexture.New(width, height, create)
if err != nil {
return nil, err
}
return rendertarget.NewWithFramebuffer(texture, framebuffer), nil
}
func createFramebuffer(nativeTexture C.GLuint) C.GLuint {
framebuffer := C.GLuint(0)
C.glGenFramebuffers(1, &framebuffer)
origFramebuffer := C.GLint(0)
C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &origFramebuffer)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
C.glFramebufferTexture2D(C.GL_FRAMEBUFFER, C.GL_COLOR_ATTACHMENT0,
C.GL_TEXTURE_2D, nativeTexture, 0)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, C.GLuint(origFramebuffer))
if C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER) !=
C.GL_FRAMEBUFFER_COMPLETE {
panic("creating framebuffer failed")
}
return framebuffer
func New(width, height int) (*gtexture.Texture, error) {
return gtexture.New(width, height, create)
}
func NewFromImage(img image.Image) (*gtexture.Texture, error) {