2014-12-24 03:04:10 +01:00
|
|
|
// Copyright 2014 Hajime Hoshi
|
|
|
|
//
|
|
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
//
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
//
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
// limitations under the License.
|
2014-12-09 15:16:04 +01:00
|
|
|
|
2015-01-26 15:32:50 +01:00
|
|
|
package graphics
|
2013-10-26 18:56:58 +02:00
|
|
|
|
|
|
|
import (
|
2016-05-10 17:49:31 +02:00
|
|
|
"fmt"
|
|
|
|
|
2015-07-22 16:27:50 +02:00
|
|
|
"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
|
2015-01-17 04:45:19 +01:00
|
|
|
)
|
|
|
|
|
2016-05-14 19:29:54 +02:00
|
|
|
type openGLState struct {
|
2016-05-16 04:34:41 +02:00
|
|
|
indexBufferQuads opengl.Buffer
|
|
|
|
programTexture opengl.Program
|
|
|
|
|
2016-05-29 15:40:51 +02:00
|
|
|
lastProgram opengl.Program
|
|
|
|
lastProjectionMatrix []float32
|
|
|
|
lastModelviewMatrix []float32
|
|
|
|
lastColorMatrix []float32
|
|
|
|
lastColorMatrixTranslation []float32
|
2016-06-04 18:55:28 +02:00
|
|
|
lastTexture opengl.Texture
|
2016-05-14 19:29:54 +02:00
|
|
|
}
|
2013-10-26 18:56:58 +02:00
|
|
|
|
2016-05-14 19:29:54 +02:00
|
|
|
var theOpenGLState openGLState
|
2016-06-04 18:55:28 +02:00
|
|
|
var (
|
|
|
|
zeroProgram opengl.Program
|
|
|
|
zeroTexture opengl.Texture
|
|
|
|
)
|
2013-10-26 18:56:58 +02:00
|
|
|
|
2016-05-14 19:29:54 +02:00
|
|
|
const (
|
|
|
|
indicesNum = 1 << 16
|
|
|
|
MaxQuads = indicesNum / 6
|
|
|
|
)
|
2015-01-13 15:03:37 +01:00
|
|
|
|
2015-01-15 16:57:49 +01:00
|
|
|
// unsafe.SizeOf can't be used because unsafe doesn't work with GopherJS.
|
2016-05-14 19:29:54 +02:00
|
|
|
const (
|
|
|
|
int16Size = 2
|
|
|
|
float32Size = 4
|
|
|
|
)
|
2015-01-15 16:57:49 +01:00
|
|
|
|
2016-05-16 04:32:21 +02:00
|
|
|
func Initialize(c *opengl.Context) error {
|
|
|
|
return theOpenGLState.initialize(c)
|
2016-05-14 21:05:57 +02:00
|
|
|
}
|
|
|
|
|
2016-05-16 04:54:34 +02:00
|
|
|
func Finalize(c *opengl.Context) error {
|
|
|
|
return theOpenGLState.finalize(c)
|
|
|
|
}
|
|
|
|
|
2016-05-16 04:32:21 +02:00
|
|
|
func (s *openGLState) initialize(c *opengl.Context) error {
|
2016-05-14 21:05:57 +02:00
|
|
|
s.lastProgram = zeroProgram
|
|
|
|
s.lastProjectionMatrix = nil
|
|
|
|
s.lastModelviewMatrix = nil
|
|
|
|
s.lastColorMatrix = nil
|
2016-05-29 15:40:51 +02:00
|
|
|
s.lastColorMatrixTranslation = nil
|
2016-06-04 18:55:28 +02:00
|
|
|
s.lastTexture = zeroTexture
|
2016-05-14 21:05:57 +02:00
|
|
|
|
2015-01-17 08:09:09 +01:00
|
|
|
shaderVertexModelviewNative, err := c.NewShader(c.VertexShader, shader(c, shaderVertexModelview))
|
2014-12-31 08:12:13 +01:00
|
|
|
if err != nil {
|
2016-05-10 17:49:31 +02:00
|
|
|
panic(fmt.Sprintf("graphics: shader compiling error:\n%s", err))
|
2013-10-26 18:56:58 +02:00
|
|
|
}
|
2015-01-17 08:09:09 +01:00
|
|
|
defer c.DeleteShader(shaderVertexModelviewNative)
|
2014-12-31 08:12:13 +01:00
|
|
|
|
2015-01-12 10:34:02 +01:00
|
|
|
shaderFragmentTextureNative, err := c.NewShader(c.FragmentShader, shader(c, shaderFragmentTexture))
|
2014-12-31 08:12:13 +01:00
|
|
|
if err != nil {
|
2016-05-10 17:49:31 +02:00
|
|
|
panic(fmt.Sprintf("graphics: shader compiling error:\n%s", err))
|
2014-12-31 08:12:13 +01:00
|
|
|
}
|
2015-01-12 10:34:02 +01:00
|
|
|
defer c.DeleteShader(shaderFragmentTextureNative)
|
2013-10-26 18:56:58 +02:00
|
|
|
|
2016-05-14 19:29:54 +02:00
|
|
|
s.programTexture, err = c.NewProgram([]opengl.Shader{
|
2015-01-17 08:09:09 +01:00
|
|
|
shaderVertexModelviewNative,
|
2015-01-12 10:34:02 +01:00
|
|
|
shaderFragmentTextureNative,
|
2015-01-12 12:47:49 +01:00
|
|
|
})
|
|
|
|
if err != nil {
|
|
|
|
return err
|
2014-12-31 08:48:25 +01:00
|
|
|
}
|
2015-01-12 12:47:49 +01:00
|
|
|
|
2016-05-29 11:34:30 +02:00
|
|
|
const stride = 8 // (2 [vertices] + 2 [texels]) * 2 [sizeof(int16)/bytes]
|
2016-04-07 20:18:52 +02:00
|
|
|
c.NewBuffer(c.ArrayBuffer, 4*stride*MaxQuads, c.DynamicDraw)
|
2014-12-31 09:45:23 +01:00
|
|
|
|
2016-04-07 20:18:52 +02:00
|
|
|
indices := make([]uint16, 6*MaxQuads)
|
|
|
|
for i := uint16(0); i < MaxQuads; i++ {
|
2014-12-31 09:45:23 +01:00
|
|
|
indices[6*i+0] = 4*i + 0
|
|
|
|
indices[6*i+1] = 4*i + 1
|
|
|
|
indices[6*i+2] = 4*i + 2
|
|
|
|
indices[6*i+3] = 4*i + 1
|
|
|
|
indices[6*i+4] = 4*i + 2
|
|
|
|
indices[6*i+5] = 4*i + 3
|
|
|
|
}
|
2016-05-14 19:29:54 +02:00
|
|
|
s.indexBufferQuads = c.NewBuffer(c.ElementArrayBuffer, indices, c.StaticDraw)
|
2014-12-31 09:45:23 +01:00
|
|
|
|
2014-12-31 09:53:04 +01:00
|
|
|
return nil
|
2013-10-26 18:56:58 +02:00
|
|
|
}
|
|
|
|
|
2016-05-16 04:54:34 +02:00
|
|
|
func (s *openGLState) finalize(c *opengl.Context) error {
|
|
|
|
s.lastProgram = zeroProgram
|
|
|
|
s.lastProjectionMatrix = nil
|
|
|
|
s.lastModelviewMatrix = nil
|
|
|
|
s.lastColorMatrix = nil
|
2016-05-29 15:40:51 +02:00
|
|
|
s.lastColorMatrixTranslation = nil
|
2016-06-04 18:55:28 +02:00
|
|
|
s.lastTexture = zeroTexture
|
2016-05-16 04:54:34 +02:00
|
|
|
c.DeleteBuffer(s.indexBufferQuads)
|
|
|
|
c.DeleteProgram(s.programTexture)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2015-02-18 03:30:24 +01:00
|
|
|
func areSameFloat32Array(a, b []float32) bool {
|
|
|
|
if len(a) != len(b) {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
for i := 0; i < len(a); i++ {
|
|
|
|
if a[i] != b[i] {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
|
2016-02-06 21:13:54 +01:00
|
|
|
type programContext struct {
|
2016-05-14 19:29:54 +02:00
|
|
|
state *openGLState
|
2016-02-06 21:13:54 +01:00
|
|
|
program opengl.Program
|
|
|
|
context *opengl.Context
|
|
|
|
projectionMatrix []float32
|
|
|
|
texture opengl.Texture
|
|
|
|
geoM Matrix
|
|
|
|
colorM Matrix
|
2015-01-12 13:04:52 +01:00
|
|
|
}
|
|
|
|
|
2016-02-06 21:13:54 +01:00
|
|
|
func (p *programContext) begin() {
|
|
|
|
c := p.context
|
2016-05-14 19:37:25 +02:00
|
|
|
if p.state.lastProgram != p.program {
|
2016-02-06 21:13:54 +01:00
|
|
|
c.UseProgram(p.program)
|
2016-05-29 16:04:20 +02:00
|
|
|
if p.state.lastProgram != zeroProgram {
|
|
|
|
c.DisableVertexAttribArray(p.state.lastProgram, "tex_coord")
|
|
|
|
c.DisableVertexAttribArray(p.state.lastProgram, "vertex")
|
|
|
|
}
|
|
|
|
c.EnableVertexAttribArray(p.program, "vertex")
|
|
|
|
c.EnableVertexAttribArray(p.program, "tex_coord")
|
|
|
|
c.VertexAttribPointer(p.program, "vertex", false, int16Size*4, 2, int16Size*0)
|
|
|
|
c.VertexAttribPointer(p.program, "tex_coord", true, int16Size*4, 2, int16Size*2)
|
|
|
|
|
2016-05-14 19:29:54 +02:00
|
|
|
p.state.lastProgram = p.state.programTexture
|
|
|
|
p.state.lastProjectionMatrix = nil
|
|
|
|
p.state.lastModelviewMatrix = nil
|
|
|
|
p.state.lastColorMatrix = nil
|
2016-05-29 15:40:51 +02:00
|
|
|
p.state.lastColorMatrixTranslation = nil
|
2016-06-04 18:55:28 +02:00
|
|
|
p.state.lastTexture = zeroTexture
|
2016-06-04 15:12:55 +02:00
|
|
|
c.BindElementArrayBuffer(p.state.indexBufferQuads)
|
|
|
|
c.UniformInt(p.program, "texture", 0)
|
2014-12-20 10:07:25 +01:00
|
|
|
}
|
2015-01-17 04:45:19 +01:00
|
|
|
|
2016-05-14 19:29:54 +02:00
|
|
|
if !areSameFloat32Array(p.state.lastProjectionMatrix, p.projectionMatrix) {
|
2016-02-06 21:13:54 +01:00
|
|
|
c.UniformFloats(p.program, "projection_matrix", p.projectionMatrix)
|
2016-05-14 19:29:54 +02:00
|
|
|
if p.state.lastProjectionMatrix == nil {
|
|
|
|
p.state.lastProjectionMatrix = make([]float32, 16)
|
2015-02-18 03:30:24 +01:00
|
|
|
}
|
2016-05-14 19:29:54 +02:00
|
|
|
copy(p.state.lastProjectionMatrix, p.projectionMatrix)
|
2015-02-18 03:30:24 +01:00
|
|
|
}
|
2013-10-26 18:56:58 +02:00
|
|
|
|
2016-02-06 21:13:54 +01:00
|
|
|
ma := float32(p.geoM.Element(0, 0))
|
|
|
|
mb := float32(p.geoM.Element(0, 1))
|
|
|
|
mc := float32(p.geoM.Element(1, 0))
|
|
|
|
md := float32(p.geoM.Element(1, 1))
|
|
|
|
tx := float32(p.geoM.Element(0, 2))
|
|
|
|
ty := float32(p.geoM.Element(1, 2))
|
2015-02-18 03:30:24 +01:00
|
|
|
modelviewMatrix := []float32{
|
2014-12-31 10:23:18 +01:00
|
|
|
ma, mc, 0, 0,
|
|
|
|
mb, md, 0, 0,
|
2013-10-26 18:56:58 +02:00
|
|
|
0, 0, 1, 0,
|
|
|
|
tx, ty, 0, 1,
|
|
|
|
}
|
2016-05-14 19:29:54 +02:00
|
|
|
if !areSameFloat32Array(p.state.lastModelviewMatrix, modelviewMatrix) {
|
2016-02-06 21:13:54 +01:00
|
|
|
c.UniformFloats(p.program, "modelview_matrix", modelviewMatrix)
|
2016-05-14 19:29:54 +02:00
|
|
|
if p.state.lastModelviewMatrix == nil {
|
|
|
|
p.state.lastModelviewMatrix = make([]float32, 16)
|
2015-02-18 03:30:24 +01:00
|
|
|
}
|
2016-05-14 19:29:54 +02:00
|
|
|
copy(p.state.lastModelviewMatrix, modelviewMatrix)
|
2015-02-18 03:30:24 +01:00
|
|
|
}
|
|
|
|
|
2013-10-26 18:56:58 +02:00
|
|
|
e := [4][5]float32{}
|
|
|
|
for i := 0; i < 4; i++ {
|
|
|
|
for j := 0; j < 5; j++ {
|
2016-02-06 21:13:54 +01:00
|
|
|
e[i][j] = float32(p.colorM.Element(i, j))
|
2013-10-26 18:56:58 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-18 03:30:24 +01:00
|
|
|
colorMatrix := []float32{
|
2013-10-26 18:56:58 +02:00
|
|
|
e[0][0], e[1][0], e[2][0], e[3][0],
|
|
|
|
e[0][1], e[1][1], e[2][1], e[3][1],
|
|
|
|
e[0][2], e[1][2], e[2][2], e[3][2],
|
|
|
|
e[0][3], e[1][3], e[2][3], e[3][3],
|
|
|
|
}
|
2016-05-14 19:29:54 +02:00
|
|
|
if !areSameFloat32Array(p.state.lastColorMatrix, colorMatrix) {
|
2016-02-06 21:13:54 +01:00
|
|
|
c.UniformFloats(p.program, "color_matrix", colorMatrix)
|
2016-05-14 19:29:54 +02:00
|
|
|
if p.state.lastColorMatrix == nil {
|
|
|
|
p.state.lastColorMatrix = make([]float32, 16)
|
2015-02-18 03:30:24 +01:00
|
|
|
}
|
2016-05-14 19:29:54 +02:00
|
|
|
copy(p.state.lastColorMatrix, colorMatrix)
|
2015-02-18 03:30:24 +01:00
|
|
|
}
|
|
|
|
colorMatrixTranslation := []float32{
|
2013-10-26 18:56:58 +02:00
|
|
|
e[0][4], e[1][4], e[2][4], e[3][4],
|
|
|
|
}
|
2016-05-29 15:40:51 +02:00
|
|
|
if !areSameFloat32Array(p.state.lastColorMatrixTranslation, colorMatrixTranslation) {
|
|
|
|
c.UniformFloats(p.program, "color_matrix_translation", colorMatrixTranslation)
|
|
|
|
if p.state.lastColorMatrixTranslation == nil {
|
|
|
|
p.state.lastColorMatrixTranslation = make([]float32, 4)
|
|
|
|
}
|
|
|
|
copy(p.state.lastColorMatrixTranslation, colorMatrixTranslation)
|
|
|
|
}
|
2013-10-26 18:56:58 +02:00
|
|
|
|
2015-01-12 13:04:52 +01:00
|
|
|
// We don't have to call gl.ActiveTexture here: GL_TEXTURE0 is the default active texture
|
|
|
|
// See also: https://www.opengl.org/sdk/docs/man2/xhtml/glActiveTexture.xml
|
2016-06-04 18:55:28 +02:00
|
|
|
if p.state.lastTexture != p.texture {
|
|
|
|
c.BindTexture(p.texture)
|
|
|
|
p.state.lastTexture = p.texture
|
|
|
|
}
|
2016-02-06 21:13:54 +01:00
|
|
|
}
|
2015-01-12 13:04:52 +01:00
|
|
|
|
2016-02-06 21:13:54 +01:00
|
|
|
func (p *programContext) end() {
|
2013-10-26 18:56:58 +02:00
|
|
|
}
|