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graphics: Remove glMatrix

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This commit is contained in:
Hajime Hoshi 2016-10-29 05:02:22 +09:00
parent 6de9e6696e
commit 49fb2635ec
2 changed files with 15 additions and 24 deletions
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11
internal/graphics/command.go
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@ -26,15 +26,6 @@ import (
"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
)
func glMatrix(m *[4][4]float64) []float32 {
return []float32{
float32(m[0][0]), float32(m[1][0]), float32(m[2][0]), float32(m[3][0]),
float32(m[0][1]), float32(m[1][1]), float32(m[2][1]), float32(m[3][1]),
float32(m[0][2]), float32(m[1][2]), float32(m[2][2]), float32(m[3][2]),
float32(m[0][3]), float32(m[1][3]), float32(m[2][3]), float32(m[3][3]),
}
}
type Matrix interface {
Element(i, j int) float64
}
@ -213,7 +204,7 @@ func (c *drawImageCommand) Exec(context *opengl.Context, indexOffsetInBytes int)
return nil
}
_, h := c.dst.Size()
proj := glMatrix(c.dst.framebuffer.projectionMatrix(h))
proj := c.dst.framebuffer.projectionMatrix(h)
p := programContext{
state: &theOpenGLState,
program: theOpenGLState.programTexture,

28
internal/graphics/framebuffer.go
View File

@ -18,24 +18,24 @@ import (
"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
)
func orthoProjectionMatrix(left, right, bottom, top int) *[4][4]float64 {
e11 := float64(2) / float64(right-left)
e22 := float64(2) / float64(top-bottom)
e14 := -1 * float64(right+left) / float64(right-left)
e24 := -1 * float64(top+bottom) / float64(top-bottom)
func orthoProjectionMatrix(left, right, bottom, top int) []float32 {
e11 := 2 / float32(right-left)
e22 := 2 / float32(top-bottom)
e14 := -1 * float32(right+left) / float32(right-left)
e24 := -1 * float32(top+bottom) / float32(top-bottom)
return &[4][4]float64{
{e11, 0, 0, e14},
{0, e22, 0, e24},
{0, 0, 1, 0},
{0, 0, 0, 1},
return []float32{
e11, 0, 0, 0,
0, e22, 0, 0,
0, 0, 1, 0,
e14, e24, 0, 1,
}
}
type framebuffer struct {
native opengl.Framebuffer
flipY bool
proMatrix *[4][4]float64
proMatrix []float32
}
func newFramebufferFromTexture(context *opengl.Context, texture *texture) (*framebuffer, error) {
@ -56,14 +56,14 @@ func (f *framebuffer) setAsViewport(context *opengl.Context) error {
return context.SetViewport(f.native, width, height)
}
func (f *framebuffer) projectionMatrix(height int) *[4][4]float64 {
func (f *framebuffer) projectionMatrix(height int) []float32 {
if f.proMatrix != nil {
return f.proMatrix
}
m := orthoProjectionMatrix(0, viewportSize, 0, viewportSize)
if f.flipY {
m[1][1] *= -1
m[1][3] += float64(height) / float64(viewportSize) * 2
m[4*1+1] *= -1
m[4*3+1] += float32(height) / float32(viewportSize) * 2
}
f.proMatrix = m
return f.proMatrix