From b1bbc998960fff2169dc5a992c47d08723472f9b Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Sun, 14 Oct 2018 22:52:40 +0800
Subject: =?UTF-8?q?*=E7=9B=B4=E6=8E=A5=E6=B8=B2=E6=9F=93=E5=AD=97=E7=AC=A6?=
 =?UTF-8?q?=E4=B8=B2?=
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---
 src/libjin/Graphics/Drawable.cpp | 61 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 60 insertions(+), 1 deletion(-)

(limited to 'src/libjin/Graphics/Drawable.cpp')

diff --git a/src/libjin/Graphics/Drawable.cpp b/src/libjin/Graphics/Drawable.cpp
index 77c3750..4be1cc2 100644
--- a/src/libjin/Graphics/Drawable.cpp
+++ b/src/libjin/Graphics/Drawable.cpp
@@ -10,7 +10,7 @@ namespace jin
 {
 namespace graphics
 {
-    
+
     Drawable::Drawable(int w, int h)
         : texture(0)
         , size(w, h)
@@ -27,6 +27,33 @@ namespace graphics
         texture_coords[6] = 1; texture_coords[7] = 0;
     }
 
+    Drawable::Drawable(const Bitmap* bitmap)
+        : texture(0)
+        , anchor(0, 0)
+    {
+        unsigned int w = size.w = bitmap->getWidth();
+        unsigned int h = size.h = bitmap->getHeight();
+
+        vertex_coords[0] = 0; vertex_coords[1] = 0;
+        vertex_coords[2] = 0; vertex_coords[3] = h;
+        vertex_coords[4] = w; vertex_coords[5] = h;
+        vertex_coords[6] = w; vertex_coords[7] = 0;
+
+        texture_coords[0] = 0; texture_coords[1] = 0;
+        texture_coords[2] = 0; texture_coords[3] = 1;
+        texture_coords[4] = 1; texture_coords[5] = 1;
+        texture_coords[6] = 1; texture_coords[7] = 0;
+
+        const Color* pixels = bitmap->getPixels();
+
+        texture = gl.genTexture();
+        gl.bindTexture(texture);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        gl.texImage(GL_RGBA8, w, h, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+        gl.bindTexture(0);
+    }
+
     Drawable::~Drawable()
     {
         glDeleteTextures(1, &texture);
@@ -53,6 +80,38 @@ namespace graphics
         gl.bindTexture(0);
     }
 
+    void Drawable::draw(const math::Quad& slice, int x, int y, float sx, float sy, float r, float ax, float ay)
+    {
+        float vertCoords[8] = {
+            0,       0, 
+            0,       slice.h,
+            slice.w, slice.h,
+            slice.w, 0
+        };
+        float slx = slice.x / size.w;
+        float sly = slice.y / size.h;
+        float slw = slice.w / size.w;
+        float slh = slice.h / size.h;
+        float texCoords[8] = {
+            slx,       sly, 
+            slx,       sly + slh,
+            slx + slw, sly + slh, 
+            slx + slw, sly
+        };
+
+        gl.ModelMatrix.setTransformation(x, y, r, sx, sy, ax, ay);
+
+        Shader* shader = Shader::getCurrentShader();
+        shader->sendMatrix4(SHADER_MODEL_MATRIX, &gl.ModelMatrix);
+        shader->sendMatrix4(SHADER_PROJECTION_MATRIX, &gl.ProjectionMatrix);
+        shader->bindVertexPointer(2, GL_FLOAT, 0, vertCoords);
+        shader->bindUVPointer(2, GL_FLOAT, 0, texCoords);
+
+        gl.bindTexture(texture);
+        gl.drawArrays(GL_QUADS, 0, 4);
+        gl.bindTexture(0);
+    }
+
 } // render
 } // jin
 
-- 
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