Fixed PSP rendering

src/duskpsp/network/networkpsp.c

@@ -10,6 +10,7 @@
 #include "util/string.h"
 #include "assert/assert.h"
 #include "display/displaysdl2.h"
+#include "display/shader/shadergl.h"
 
 errorret_t networkPSPInit() {
   // Requests the PSP to load the network modules.
@@ -65,6 +66,49 @@ errorret_t networkPSPUpdate() {
         break;
 
       case PSP_UTILITY_DIALOG_VISIBLE:
+        // The dialog renders using whatever GL state we leave lying
+        // around, immediately before it draws - it doesn't set up its
+        // own blend/cull/depth/texture state from scratch. Match exactly
+        // what our own text rendering uses (displaySetState's
+        // BLEND-only flags, plus shaderUnlitSetMaterial's texture/color
+        // setup), otherwise its text/icons render missing while its
+        // untextured chrome still appears fine.
+        glDisable(GL_CULL_FACE);
+        errorChain(errorGLCheck());
+        glDisable(GL_DEPTH_TEST);
+        errorChain(errorGLCheck());
+        glEnable(GL_BLEND);
+        errorChain(errorGLCheck());
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        errorChain(errorGLCheck());
+
+        glEnable(GL_TEXTURE_2D);
+        errorChain(errorGLCheck());
+        glBindTexture(GL_TEXTURE_2D, TEXTURE_WHITE.id);
+        errorChain(errorGLCheck());
+        glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+        errorChain(errorGLCheck());
+        glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
+        errorChain(errorGLCheck());
+        SHADER_LEGACY.boundTextureId = TEXTURE_WHITE.id;
+
+        // pspGL defers actually applying state to the GPU until the
+        // next real draw call - the calls above alone may be no-ops
+        // on hardware. Force a flush with a degenerate (zero-area, so
+        // nothing actually rasterizes) triangle.
+        const float_t degenerate[3 * 5] = {
+          0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
+          0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
+          0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
+        };
+        const GLsizei stride = sizeof(float_t) * 5;
+        glVertexPointer(3, GL_FLOAT, stride, &degenerate[0]);
+        errorChain(errorGLCheck());
+        glTexCoordPointer(2, GL_FLOAT, stride, &degenerate[3]);
+        errorChain(errorGLCheck());
+        glDrawArrays(GL_TRIANGLES, 0, 3);
+        errorChain(errorGLCheck());
+
         // 1 is mandatory?
         ret = sceUtilityNetconfUpdate(1);
         if(ret != 0) {