sdk: GL blitter

git-svn-id: svn://kolibrios.org@4502 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-01-21 14:25:30 +00:00
parent d605acf341
commit f53662a0f4
6 changed files with 677 additions and 41 deletions
--- a/contrib/sdk/sources/render/swap.c
+++ b/contrib/sdk/sources/render/swap.c
@@ -0,0 +1,100 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "render.h"
+#include <kos32sys.h>
+
+void render_swap_and_blit(struct render *render)
+{
+    char proc_info[1024];
+
+    EGLContext context;
+    EGLSurface draw, read;
+    int winx, winy;
+
+    float dst_xscale, dst_yscale;
+    float *vertices  = render->vertices;
+    float *texcoords = render->texcoords;
+    int r, b;
+
+    if(render == NULL)
+        return;
+
+    get_proc_info(proc_info);
+
+    winx = *(uint32_t*)(proc_info+34);
+    winy = *(uint32_t*)(proc_info+38);
+
+    context = eglGetCurrentContext();
+    draw = eglGetCurrentSurface(EGL_DRAW);
+    read = eglGetCurrentSurface(EGL_READ);
+
+    eglSwapBuffers(render->dpy,draw);
+
+    if (!eglMakeCurrent(render->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, render->context))
+    {
+        printf("failed to make window current");
+        goto err1;
+    };
+
+    glUseProgram(render->blit_prog);
+    glUniform1i(render->sampler, 0);
+
+    glVertexAttribPointer(0, 2, GL_FLOAT,GL_FALSE, 2 * sizeof(float),render->vertices);
+    glEnableVertexAttribArray(0);
+
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, render->tx_buffers[render->back_buffer]);
+    glTexParameteri(GL_TEXTURE_2D,
+                  GL_TEXTURE_MIN_FILTER,
+                  GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D,
+                  GL_TEXTURE_MAG_FILTER,
+                  GL_NEAREST);
+
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float),render->texcoords);
+    glEnableVertexAttribArray(1);
+
+    dst_xscale = 1.0/render->scr_width;
+    dst_yscale = 1.0/render->scr_height;
+
+    r = winx + render->dx + render->width;
+    b = winy + render->dy + render->height;
+
+    float t0, t1, t2, t5;
+
+    vertices[0]     = t0 = 2*(winx+render->dx)*dst_xscale - 1.0;
+    vertices[1 * 2] = t2 = 2*r*dst_xscale - 1.0;
+
+    vertices[2 * 2] = t2;
+    vertices[3 * 2] = t0;
+
+    vertices[1]     = t1 = 2*(winy+render->dy)*dst_yscale - 1.0;
+    vertices[2*2+1] = t5 = 2*b*dst_yscale - 1.0;
+    vertices[1*2+1] = t1;
+    vertices[3*2+1] = t5;
+
+    texcoords[0]    = 0.0;
+    texcoords[1]    = 0.0;
+    texcoords[1*2]  = 1.0;
+    texcoords[1*2+1]= 0.0;
+    texcoords[2*2]  = 1.0;
+    texcoords[2*2+1]= 1.0;
+    texcoords[3*2]  = 0.0;
+    texcoords[3*2+1]= 1.0;
+
+    glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+    glDisableVertexAttribArray(0);
+    glDisableVertexAttribArray(1);
+    glDisable(GL_TEXTURE_2D);
+    glUseProgram(0);
+
+    render->back_buffer++;
+    render->back_buffer&=1;
+
+err1:
+    eglMakeCurrent(render->dpy, draw, read, context);
+}
+