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1 #include <assert.h>
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2 #include "gfxutil.h"
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3 #include "mesh.h"
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4 #include "meshgen.h"
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5 #include "texture.h"
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6 #include "shader.h"
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7 #include "sdrman.h"
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8 #include "opengl.h"
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9 #include "logger.h"
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10
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11 using namespace goatgfx;
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12
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13 void draw_rect(const Vector3 &v1, const Vector3 &v2, Texture2D *tex, ShaderProg *sdr)
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14 {
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15 static ShaderProg *defsdr;
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16
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17 if(!defsdr) {
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18 if(!(defsdr = get_sdrprog("defpost.v.glsl", "defpost.p.glsl"))) {
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19 static bool didlog;
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20 if(!didlog) {
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21 error_log("draw_rect: failed to load default shader\n");
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22 didlog = true;
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23 }
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24 if(!sdr) {
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25 return;
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26 }
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27 }
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28 }
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29
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30
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31 if(tex) {
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32 set_texture(tex);
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33 }
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34 if(sdr) {
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35 sdr->bind();
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36 } else {
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37 defsdr->bind();
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38
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39 assert(defsdr->get_attrib_location("attr_vertex") == MESH_ATTR_VERTEX);
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40 assert(defsdr->get_attrib_location("attr_texcoord") == MESH_ATTR_TEXCOORD);
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41 }
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42
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43
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44 float varr[] = {
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45 v1.x, v1.y, v1.z, v2.x, v1.y, v2.z,
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46 v2.x, v2.y, v2.z, v1.x, v2.y, v1.z
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47 };
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48 static const float tarr[] = { 0, 0, 1, 0, 1, 1, 0, 1 };
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49 static const unsigned int idxarr[] = {0, 1, 2, 0, 2, 3};
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50
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51 // disable VBOs if they are enabled
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52 glBindBuffer(GL_ARRAY_BUFFER, 0);
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53 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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54
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55 glEnableVertexAttribArray(MESH_ATTR_VERTEX);
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56 glVertexAttribPointer(MESH_ATTR_VERTEX, 3, GL_FLOAT, GL_FALSE, 0, varr);
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57 glEnableVertexAttribArray(MESH_ATTR_TEXCOORD);
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58 glVertexAttribPointer(MESH_ATTR_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, tarr);
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59
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60 glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, idxarr);
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61
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62 glDisableVertexAttribArray(MESH_ATTR_VERTEX);
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63 glDisableVertexAttribArray(MESH_ATTR_TEXCOORD);
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64
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65 set_texture(0);
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66 }
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